<PAGE>   1
 
================================================================================
 
                                 UNITED STATES
 
                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549
 
                            ------------------------
 
                                  FORM 10-Q/A
                            ------------------------
 
(MARK ONE)
 
     [X] QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES
         EXCHANGE ACT OF 1934
 
               FOR THE QUARTERLY PERIOD ENDED SEPTEMBER 30, 1997
 
                                       OR
 
     [ ] TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES
         EXCHANGE ACT OF 1934
 
                          COMMISSION FILE NO. 0-27506
 
                            ------------------------
 
                                   COHR INC.
             (EXACT NAME OF REGISTRANT AS SPECIFIED IN ITS CHARTER)
 
                            ------------------------
 
<TABLE>
<S>                                            <C>
                   DELAWARE                                      95-4559155
       (STATE OR OTHER JURISDICTION OF                        (I.R.S. EMPLOYER
        INCORPORATION OR ORGANIZATION)                        IDENTIFICATION)
 
             21540 PLUMMER STREET                                91311-4103
            CHATSWORTH, CALIFORNIA                               (ZIP CODE)
   (ADDRESS OF PRINCIPAL EXECUTIVE OFFICES)
</TABLE>
 
       REGISTRANT'S TELEPHONE NUMBER, INCLUDING AREA CODE: (818) 773-2647
 
                            ------------------------
 
     Indicate by check mark whether the Registrant (1) has filed all reports
required to be filed by Section 13 or 15(d) of the Securities Exchange Act of
1934 during the preceding 12 months (or for such shorter period that the
registrant was required to file such reports), and (2) has been subject to such
filing requirements for the past 90 days.  YES [X]  NO [ ]
 
     As of March 17, 1998 there were outstanding 6,433,189 shares of the
Registrant's Common Stock, par value $0.01.
 
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<PAGE>   2
 
                           COHR INC. AND SUBSIDIARIES
 
                               TABLE OF CONTENTS
 
<TABLE>
<CAPTION>
                                                                        PAGE
                                                                       NUMBER
                                                                       ------
<S>      <C>                                                           <C>
PART I   FINANCIAL INFORMATION
Item 1   Consolidated Financial Statements...........................     3
         Consolidated Balance Sheets as of September 30, 1997
         (unaudited) and
         March 31, 1997..............................................     3
         Consolidated Statements of Operations for the three months
         ended September 30, 1997 and September 30, 1996 (unaudited)
         and the six months ended September 30, 1997 and September
         30, 1996 (unaudited)........................................     4
         Consolidated Statements of Cash Flows for the six months
         ended September 30, 1997 and September 30, 1996
         (unaudited).................................................     5
         Notes to Consolidated Financial Statements..................     6
Item 2   Management's Discussion and Analysis of Financial Condition
         and Results of Operations...................................     8
 
PART II  OTHER INFORMATION
Item 6   Exhibits....................................................    10
</TABLE>
 
                            ------------------------
 
     This Form 10-Q/A and other statements issued or made from time to time by
COHR Inc. or its representatives contain statements which may constitute
"forward-looking statements" within the meaning of the Securities Act of 1933
and the Securities Exchange Act of 1934, as amended by the Private Securities
Litigation Reform Act of 1995. 15 U.S.C.A. sections 772-2 and 78u-5 (SUPP.1996).
Those statements include statements regarding the intent, belief or current
expectation of COHR Inc. and members of its management team as well as the
assumptions on which such statements are based. Prospective investors are
cautioned that such forward-looking statements are not guarantees of future
performance and involve risks and uncertainties, and that actual results may
differ materially from those contemplated by such forward-looking statements.
Important factors currently known to management that could cause actual results
to differ materially from those in forward-looking statements are set forth in
the safe harbor compliance statement for forward-looking statements included
herein and in the Company's documents filed from time to time with the
Securities and Exchange Commission. The Company undertakes no obligation to
update or revise forward-looking statements to reflect changed assumptions, the
occurrence of unanticipated events or changes to future operating results over
time.
 
                                        2
<PAGE>   3
 
     In its press release attached as an exhibit to the Company's Form 10-Q
Quarterly Report for the period ended December 31, 1997 filed with the
Securities and Exchange Commission on February 17, 1998, the Company announced
its intention to restate previously reported financial statements for the first
two quarters of fiscal 1998 and for the fiscal year ended March 31, 1997. The
following items of the Company's Form 10-Q for the quarter ended September 30,
1997 are hereby amended.
 
                                     PART I
 
                           COHR INC. AND SUBSIDIARIES
                          CONSOLIDATED BALANCE SHEETS
                    (IN THOUSANDS, EXCEPT NUMBER OF SHARES)
 
ITEM 1. FINANCIAL STATEMENTS
 
                                     ASSETS
 
<TABLE>
<CAPTION>
                                                              SEPTEMBER 30,      MARCH 31,
                                                                  1997             1997
                                                              -------------    -------------
                                                                               (AS RESTATED,
                                                               (UNAUDITED)      SEE NOTE 3)
<S>                                                           <C>              <C>
CURRENT ASSETS:
  Cash and cash equivalents.................................     $18,451          $22,948
  Investments...............................................       2,000            6,000
  Accounts receivable -- Trade, net of allowance for
     doubtful accounts of $1,825 (September 30, 1997) and
     $1,490 (March 31, 1997)................................      30,366           24,681
     Other..................................................         332            2,325
  Inventory.................................................       9,659            9,126
  Prepaid expenses and other................................       1,684            1,263
  Income tax refund receivable..............................       3,827            1,348
  Deferred income tax asset.................................       1,138            1,124
                                                                 -------          -------
          Total current assets..............................      67,457           68,815
EQUIPMENT AND IMPROVEMENTS, net.............................       7,144            6,636
INTANGIBLE ASSETS, net of accumulated amortization of $1,108
  (September 30, 1997) and $665 (March 31, 1997)............       9,543            9,237
OTHER ASSETS................................................       1,288              391
                                                                 -------          -------
          TOTAL.............................................     $85,432          $85,079
                                                                 =======          =======
 
                            LIABILITIES AND SHAREHOLDERS' EQUITY
CURRENT LIABILITIES:
  Notes payable.............................................     $   137          $ 1,342
  Accounts payable -- trade.................................       7,205            5,668
  Accrued expenses..........................................       5,696            4,669
  Deferred revenue..........................................       6,670            6,394
  Current portion of long-term debt.........................         850              853
                                                                 -------          -------
          Total current liabilities.........................      20,558           18,926
LONG-TERM DEBT..............................................         509            1,146
DEFERRED INCOME TAX LIABILITY...............................         611              499
SHAREHOLDERS' EQUITY
  Preferred Stock, $.01 par value; 2,000,000 shares
     authorized; no shares issued and outstanding Common
     Stock, $.01 par value; 20,000,000 shares authorized;
     6,433,000 (September 30, 1997) and 6,391,000 (March 31,
     1997) shares issued and outstanding....................         887              887
  Additional paid in capital................................      55,153           55,153
  Retained earnings.........................................       7,714            8,468
                                                                 -------          -------
          Total shareholders' equity........................      63,754           64,508
                                                                 -------          -------
          TOTAL.............................................     $85,432          $85,079
                                                                 =======          =======
</TABLE>
 
                                        3
<PAGE>   4
 
                           COHR INC. AND SUBSIDIARIES
 
                     CONSOLIDATED STATEMENTS OF OPERATIONS
                                  (UNAUDITED)
                    (IN THOUSANDS, EXCEPT PER SHARE AMOUNTS)
 
<TABLE>
<CAPTION>
                                                   THREE MONTHS ENDED           SIX MONTHS ENDED
                                                     SEPTEMBER 30,               SEPTEMBER 30,
                                                ------------------------    ------------------------
                                                    1997          1996          1997          1996
                                                -------------    -------    -------------    -------
                                                (AS RESTATED,               (AS RESTATED,
                                                 SEE NOTE 3)                 SEE NOTE 3)
<S>                                             <C>              <C>        <C>              <C>
Revenues......................................     $25,964       $21,205       $50,775       $41,670
Direct operating expenses.....................      21,374        15,272        41,402        29,992
                                                   -------       -------       -------       -------
Gross margin..................................       4,590         5,933         9,373        11,678
Selling, general and administrative
  expenses....................................       5,422         4,208        11,060         8,625
                                                   -------       -------       -------       -------
Operating income (loss).......................        (832)        1,725        (1,687)        3,053
Interest income...............................         264            83           574           315
Interest expense..............................         (23)            0           (37)           (9)
                                                   -------       -------       -------       -------
Income (loss) before income taxes (benefit)...        (591)        1,808        (1,150)        3,359
Provision (benefit) for income taxes..........        (192)          744          (396)        1,364
                                                   -------       -------       -------       -------
Net income (loss).............................     $  (399)      $ 1,064       $  (754)      $ 1,995
                                                   =======       =======       =======       =======
Net income (loss) per share...................     $ (0.06)      $  0.22       $ (0.12)      $  0.41
                                                   =======       =======       =======       =======
Number of shares used to compute net income
  (loss) per share............................       6,433         4,832         6,426         4,832
                                                   =======       =======       =======       =======
</TABLE>
 
                                        4
<PAGE>   5
 
                           COHR INC. AND SUBSIDIARIES
 
                     CONSOLIDATED STATEMENTS OF CASH FLOWS
                                  (UNAUDITED)
                                 (IN THOUSANDS)
 
<TABLE>
<CAPTION>
                                                                   SIX MONTHS ENDED
                                                                    SEPTEMBER 30,
                                                              --------------------------
                                                                  1997            1996
                                                              -------------      -------
                                                              (AS RESTATED,
                                                               SEE NOTE 3)
<S>                                                           <C>                <C>
CASH FLOWS FROM OPERATING ACTIVITIES:
  Net income (loss).........................................     $  (754)        $ 1,995
                                                                 -------         -------
  Adjustments to reconcile net income to net cash provided
     by operating activities:
     Depreciation and amortization..........................       1,046             462
     Provision for losses on accounts receivable............         485             140
     Deferred income tax asset -- current portion...........          98
     Change in assets and liabilities, net of effect of
      acquisition of certain assets:
       Accounts receivable -- trade.........................      (4,177)         (4,475)
       Inventory............................................         (54)         (1,199)
       Prepaid expense and other............................        (421)            108
       Income tax refund receivable.........................      (2,479)
       Other assets.........................................        (717)           (132)
       Accounts payable -- trade............................       1,537              83
       Accrued expenses.....................................       1,027          (1,895)
       Deferred revenue.....................................         276          (1,343)
                                                                 -------         -------
          Total adjustments.................................      (3,379)         (8,251)
                                                                 -------         -------
          Net cash used in operating activities.............      (4,133)         (6,256)
                                                                 -------         -------
CASH FLOWS FROM INVESTING ACTIVITIES:
  Capital expenditures......................................        (973)         (1,291)
  Payment for acquisition of certain assets.................      (1,327)         (3,886)
  Sale of investments.......................................       4,000
                                                                 -------         -------
          Net cash provided by (used in) investing
           activities.......................................       1,700          (5,177)
                                                                 -------         -------
CASH FLOWS FROM FINANCING ACTIVITIES:
  Issuance of long-term debt................................                       1,498
  Payments on long-term debt................................      (2,064)            (61)
  Issue of stock............................................                         180
                                                                 -------         -------
          Net cash (used in) provided by financing
           activities.......................................      (2,064)          1,617
                                                                 -------         -------
NET DECREASE IN CASH AND CASH EQUIVALENTS...................      (4,497)         (9,816)
CASH AND CASH EQUIVALENTS, beginning of year................      22,948          19,314
                                                                 -------         -------
CASH AND CASH EQUIVALENTS, end of year......................     $18,451         $ 9,498
                                                                 =======         =======
SUPPLEMENTAL DISCLOSURE OF CASH FLOW INFORMATION --
  Cash paid during the period for:
  Income taxes..............................................     $ 2,775         $ 1,010
                                                                 =======         =======
  Interest..................................................     $    37         $     9
                                                                 =======         =======
DETAILS OF BUSINESSES OR ASSETS ACQUIRED AT FAIR VALUE ARE
  AS FOLLOWS:
  Current assets............................................     $   479         $ 1,988
  Equipment.................................................         138             905
  Goodwill and other intangibles............................         929           3,410
                                                                 -------         -------
                                                                   1,546           6,303
                                                                 -------         -------
  Note issued
  Liabilities assumed.......................................         219           2,417
                                                                 -------         -------
          Net cash paid for acquisitions....................     $ 1,327         $ 3,886
                                                                 =======         =======
</TABLE>
 
                                        5
<PAGE>   6
 
                           COHR INC. AND SUBSIDIARIES
 
                   NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
                      SIX MONTHS ENDED SEPTEMBER 30, 1997
                                  (UNAUDITED)
 
1. BASIS OF PRESENTATION
 
     In the opinion of management, the accompanying consolidated financial
statements include all adjustments necessary for a fair presentation of the
financial position of COHR Inc. ("COHR") and subsidiaries (collectively, the
"Company"), and the results of its operations and its cash flows for the interim
periods presented. Although COHR believes that the disclosures in these
consolidated financial statements are adequate to make the information presented
not misleading, certain information and footnote disclosures normally included
in financial statements prepared in accordance with generally accepted
accounting principles have been condensed or omitted pursuant to the rules and
regulations of the Securities and Exchange Commission. Results of operations for
the interim periods are not necessarily indicative of results to be expected for
any other interim period or for the full year.
 
     The consolidated financial statements for the three month and six month
periods ended September 30, 1997 (restated) and September 30, 1996 are unaudited
and should be read in conjunction with the consolidated financial statements and
notes thereto included in COHR's Annual Report on Form 10-K for the year ended
March 31, 1997 as amended by Form 10-K/A filed on March 18, 1998.
 
     Consolidation of Subsidiaries -- The Company's financial statements include
the activity of all of its wholly-owned subsidiaries over which the Company has
direct or indirect or indirect unilateral and perpetual control. All
intercompany transactions have been eliminated in consolidation.
 
     Net Income (Loss) per Common Share -- Net income (loss) per common share is
computed based on the weighted average number of shares outstanding. The
Financial Accounting Standards Board has issued Statement of Financial
Accounting Standard No 128, "Earnings Per Share", which specifies the
computation, presentation and disclosure requirements for Earnings per Share
(EPS). The accounting and disclosure requirements of this statement are
effective for financial statements for interim and annual periods ending after
December 15, 1997, earlier adoption is not permitted. The calculation of basic
EPS for the period ended September 30, 1997, under SFAS No. 128 would not be
materially different from those reported.
 
2. SUBSEQUENT EVENTS
 
     Subsequent to September 30, 1997, the Company acquired the business of a
company similar to that of COHR Inc. The acquisition included the purchase of
certain assets including inventory, equipment, and other assets, for a purchase
price of $385,000, of which $250,000 was paid in cash, with a short term note
issued for the remainder.
 
3. RESTATEMENT
 
     Subsequent to the issuance of the Company's fiscal 1997 consolidated
financial statements, the Company's management determined that certain equipment
and software sales were prematurely recorded and that certain liabilities were
understated. As a result, the accompanying consolidated balance sheet as of
March 31, 1997 and the statements of operations and cash flows for the three and
six months ended September 30, 1997 have been restated from the amounts
previously reported to reverse these sales and to record the appropriate
liabilities.
 
                                        6
<PAGE>   7
                           COHR INC. AND SUBSIDIARIES
 
             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)
 
                     THREE MONTHS AND THE SIX MONTHS ENDED
                               SEPTEMBER 30, 1997
                                  (UNAUDITED)
 
     A summary of the significant effects of the restatement is as follows:
 
<TABLE>
<CAPTION>
                                                              AS PREVIOUSLY      AS
                                                                REPORTED      RESTATED
                                                              -------------   --------
<S>                                                           <C>             <C>
AT MARCH 31, 1997:
  Accounts receivable.......................................     $25,439      $24,681
  Accounts payable -- trade.................................       4,040        5,668
  Accrued expenses..........................................       2,618        4,669
  Retained earnings.........................................      10,961        8,468
AT SEPTEMBER 30, 1997
  Accounts receivable.......................................     $31,785      $30,366
  Accounts payable -- trade.................................       2,962        7,205
  Accrued expenses..........................................       1,953        5,696
  Retained earnings.........................................      13,788        7,714
FOR THE THREE MONTHS ENDED SEPTEMBER 30, 1997:
  Revenues..................................................     $25,591      $25,964
  Direct operating expenses.................................      18,634       21,374
  Selling, general and administrative expenses..............       5,112        5,422
  Income (loss) before taxes................................       2,086         (591)
  Net income (loss).........................................       1,268         (399)
  Net income (loss) per share...............................         .19         (.06)
FOR THE SIX MONTHS ENDED SEPTEMBER, 1997:
  Revenues..................................................     $52,002      $50,775
  Direct operating expenses.................................      37,796       41,402
  Selling, general and administrative expenses..............      14,206       11,060
  Income (loss) before taxes................................       4,759       (1,150)
  Net (loss) income.........................................       2,827         (754)
  Net income (loss) per share...............................         .43         (.12)
</TABLE>
 
                                        7
<PAGE>   8
 
ITEM 2. MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS
        OF OPERATIONS
 
GENERAL
 
     The Company is a leading national outsourcing service organization
providing equipment servicing, group purchasing and other services to hospitals,
integrated health systems and alternate site providers.
 
RESTATEMENT OF PRIOR PERIOD FINANCIAL STATEMENTS
 
     The Company has concluded that a restatement of previously reported
financial statements for the first two quarters of fiscal year 1998 and for
fiscal year 1997 is appropriate based upon management's determination that
certain equipment and software sales were prematurely recorded and that certain
liabilities were understated. Please see Note 3 to the Consolidated Financial
Statements for the Three and Six Months Ended September 30, 1997.
 
RESULTS OF OPERATIONS
 
  Six Months Ended September 30, 1997, as restated, versus Six Months Ended
September 30, 1996
 
     Revenues. The Company's revenues for the six months ended September 30,
1997 totaled $50.8 million, an increase of $9.1 million or 21.8% over revenues
of $41.7 million for the six months ended September 30, 1996. Of the $9.1
million increase in revenues, $8.5 million resulted from growth in COHR
MasterPlan. The $8.5 million increase resulted primarily from internally
generated growth. The Company acquired two new service and sales sites in the
six months ended September 30, 1997.
 
     Direct Operating Expenses. The Company's direct expenses for the six months
ended September 30, 1997 totaled $41.4 million which represented an increase of
$11.4 million or 38.0% over the six months ended September 30, 1996 total of
$30.0 million. Direct operating expenses as a percentage of revenues for the six
months ended September 30, 1997 increased to 81.5% from 72.0% for the six months
ended September 30, 1996. This increase resulted primarily from the fact that
the Company derived a greater percentage of revenues from COHR MasterPlan, which
has higher direct operating expenses as a percentage of revenues than Purchase
Connection. Additional factors contributing to the increase include growth in
the number of sales and service employees and related employee costs, start-up
costs associated with new accounts, the outsourcing of a greater number of
services provided to customers, and an increase in customer rebate accruals.
 
     Gross Margin. The Company's gross margin for the six months ended September
30, 1997 totaled $9.4 million, a decrease of $2.3 million or 19.7% from the six
months ended September 30, 1996 total of $11.7 million. Gross margin as a
percentage of revenues decreased to 18.5% for the six months ended September 30,
1997 from 28.0% for the six months ended September 30, 1996.
 
     Selling, General and Administrative Expenses. The Company's selling,
general and administrative expenses for the six months ended September 30, 1997
totaled $11.1 million, an increase of $2.5 million or 28.2% over the six months
ended September 30, 1996 total of $8.6 million. As a percentage of revenues,
selling, general and administrative expenses increased during the six months
ended September 30, 1997 to 21.8% from 20.7% during the six months ended
September 30, 1996. The absolute increase in expenses reflected the increase in
costs necessary to support the Company's expanded operations. Other factors
contributing to the increase include increases in the number of support
personnel, facility expenses and other expenses incurred to generate new
business and integrate recent acquisitions and an increase in the provision for
losses on accounts receivable.
 
     Operating Income (Loss). The Company's operating loss for the six months
ended September 30, 1997 totaled $1.7 million, a decrease of $4.8 million from
operating income for the six months ended September 30, 1996 of $3.1 million.
Operating income (loss) as a percentage of revenues for the six months ended
September 30, 1997 decreased to a 3.3% charge as compared to a 7.3% return for
the six months ended September 30, 1996. The operating loss can be attributed to
factors identified in the discussion of Direct Operating Expenses and Selling,
General and Administrative Expenses above.
 
                                        8
<PAGE>   9
 
     Provision for Income Taxes (Benefit). The Company's income tax benefit for
the six months ended September 30, 1997 totaled $0.4 million, a decrease in
taxes of $1.8 million from the provision for income taxes for the six months
ended September 30, 1996 of $1.4 million. The Company's effective tax (benefit)
rate was (34.4%) for the six months ended September 30, 1997 and 40.6% for the
six months ended September 30, 1996. The effective benefit rate for the six
months ended September 30, 1997 was lower than it would have otherwise been due
to the fact that the Company is unable to carryback net operating losses for
state income tax purposes.
 
     Net Income (Loss). The Company's net loss for the six months ended
September 30, 1997 totaled $0.8 million, a decrease of $2.8 million from net
income for the six months ended September 30, 1996 of $2.0 million. As a
percentage of revenues, net loss was a 1.5% charge for the six months ended
September 30, 1997 as compared to a 4.8% return for the six months ended
September 30, 1996.
 
  Three Months Ended September 30, 1997, as restated, versus Three Months Ended
September 30, 1996
 
     Revenues. The Company's revenues for the three months ended September 30,
1997 totaled $26.0 million, an increase of $4.8 million or 22.4% over revenues
of $21.2 million for the three months ended September 30, 1996. Of the $4.8
million increase in revenues, $4.2 million resulted from growth in COHR
MasterPlan. The $4.2 million increase resulted primarily from increases in
revenues from internally generated growth. The Company acquired one new service
and sales site in the three months ended September 30, 1997.
 
     Direct Operating Expenses. The Company's direct expenses for the three
months ended September 30, 1997 total $21.4 million which represented an
increase of $6.1 million or 39.9% over the three months ended September 30, 1996
total of $15.3 million. Direct operating expenses as a percentage of revenues
for the three months ended September 30, 1997 increased to 82.3% from 72.0% for
the three months ended September 30, 1996. This increase resulted primarily from
the fact the Company derived a greater percentage of revenues from COHR
MasterPlan, which has higher direct operating expenses as a percentage of
revenues than Purchase Connection. Additional factors contributing to the
increase include growth in the number of sales and service employees and related
employee costs, start-up costs associated with new accounts, the outsourcing of
a greater number of services provided to customers, and an increase in customer
rebate accruals.
 
     Gross Margin. The Company's gross margin for the three months ended
September 30, 1997 totaled $4.6 million, a decrease of $1.3 million or 22.6%
over the three months ended September 30, 1996 total of $5.9 million. Gross
margin as a percentage of revenues decreased to 17.7% for the three months ended
September 30, 1997 from 28.0% for the three months ended September 30, 1996.
 
     Selling, General and Administrative Expenses. The Company's selling,
general and administrative expenses for the three months ended September 30,
1997 totaled $5.4 million, an increase of $1.2 million or 28.9% over the three
months ended September 30, 1996 total of $4.2 million. As a percentage of
revenues, selling, general and administrative expenses increased during the
three months ended September 30, 1997 to 20.9% from 19.8% during the three
months ended September 30, 1996. The absolute increase in expenses reflected the
increase in costs necessary to support the Company's expanded operations. The
increase in selling, general and administrative expenses as a percentage of
revenues reflected additional provision for losses on accounts receivable and
increases in the number of support personnel, facility expenses and other
expenses incurred to generate new business and integrate recent acquisitions.
 
     Operating Income (Loss). The Company's operating loss for the three months
ended September 30, 1997 total $0.8 million, a decrease of $2.5 million from
operating income for the three months ended September 30, 1996 of $1.7 million.
Operating income (loss) as a percentage of revenues for the three months ended
September 30, 1997 decreased to a 3.2% charge as compared to a 8.1% return for
the three months ended September 30, 1996. The operating loss can be attributed
to factors identified in the discussion of Direct Operating Expenses and
Selling, General and Administrative Expenses above.
 
     Provision for Income Taxes (Benefit). The Company's income tax benefit for
the three months ended September 30, 1997 totaled $0.2 million, a decrease in
taxes of $0.9 million over the provision for income taxes
 
                                        9
<PAGE>   10
 
for the three months ended September 30, 1996 of $0.7 million. The Company's
effective tax rate (benefit) for the three months ended September 30, 1997 was
(32.5%) as compared to 41.2% for the three months ended September 30, 1996. The
effective benefit rate for the three months ended September 30, 1997 was lower
than it would have otherwise been due to the fact that the Company is unable to
carryback net operating losses for state income tax purposes.
 
     Net Income (Loss). The Company's net loss for the three months ended
September 30, 1997 totaled $0.4 million, a decrease of $1.5 million from net
income for the three months ended September 30, 1996 of $1.1 million. As a
percentage of revenues, the net loss was a 1.5% charge in the three months ended
September 30, 1997 as compared to a 5.0% return for the three months ended
September 30, 1996.
 
  Liquidity and Capital Resources
 
     The Company had working capital of $46.9 million and $49.9 million as of
September 30, 1997 and March 31, 1997, respectively. The Company had cash, cash
equivalents and short-term investments of $20.5 million and $28.9 million for
the same respective periods. The decrease in the amount of cash, cash
equivalents and short term investments during the first six months of fiscal
year 1998 was primarily attributable to the net operating loss (offset in part
by noncash charges for depreciation, amortization and provision for losses on
accounts receivable), capital expenditures and payment for acquired assets of
business and a repayment of long-term debt.
 
     Net cash used in operating activities was $4.1 million and $6.3 million for
the six months ended September 30, 1997 and 1996, respectively. The fluctuations
in cash used in operations is due primarily to changes in accounts receivable,
inventories, prepaid expenses, notes payable, accounts payable and accrued
expenses.
 
     Net cash provided by (used in) investing activities was $1.7 million and
$(5.2) million for the six months ended September 30, 1997 and 1996,
respectively. The principal source of cash in the six months ended September 30,
1997 was the maturity of short-term investments. The principal uses of this cash
were for the purchase of businesses, customer lists and related assets. Capital
expenditures during these periods amounted to $1.0 million and $1.3 million,
respectively.
 
     Cash flows (used in) provided by financing activities were principally for
acquiring new debt and payments on existing debt.
 
     The Company allowed its revolving credit line to expire and has not sought
a renewal thereof. The Company has not paid dividends since its initial public
offering in February of 1996.
 
  Inflation
 
     The Company believes that its operations have not been materially adversely
affected by inflation. The Company expects that salary and wage increases for
its skilled staff will continue to be higher than average wage increases, as is
common in the company's industry.
 
                                       10
<PAGE>   11
 
                          PART II -- OTHER INFORMATION
 
ITEM 6. EXHIBITS
 
     (a) Exhibits included or incorporated herein:
        
         See Index to Exhibits

 
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<PAGE>   12
 
                                   SIGNATURES
 
     Pursuant to the requirements of the Securities Exchange Act of 1934, the
registrant has duly caused this report to be signed on its behalf by the
undersigned thereunto duly authorized.
 
                                          COHR INC.
                                          (Registrant)
 
Date: March 19, 1998                              /s/  STEPHEN W. GAMBLE
 
                                          --------------------------------------
                                          Stephen W. Gamble
                                          President and Chief Executive Officer
                                          (Principal Executive Officer)
 
Date: March 19, 1998                               /s/  DANIEL F. CLARK
 
                                          --------------------------------------
                                          Daniel F. Clark
                                          Executive Vice President and Chief
                                          Financial Officer
                                          (Principal Financial Officer)
 
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<PAGE>   13
 
                           COHR INC. AND SUBSIDIARIES
 
                               INDEX TO EXHIBITS
 
<TABLE>
<CAPTION>
                                                                            SEQUENTIALLY
    EXHIBIT                                                                   NUMBERED
     NUMBER                           DESCRIPTION                               PAGE
    -------                           -----------                           ------------
    <S>       <C>                                                           <C>
     3.1*     Certificate of Incorporation of Registrant..................
     3.2*     By-laws of Registrant.......................................
     4.1*     Form of Warrant to be issued to the Representatives of the
              Underwriters................................................
     4.2*     Form of Registration Rights Agreement between Registrant,
              Healthcare Association of Southern California ("HASC") and
              Hospital Council Coordinated Programs, Inc..................
     4.3*     Specimen Stock Certificate..................................
    10.1*     Form of Indemnity Agreement entered into between Registrant
              and each of its executive officers and directors............
    10.2*     Employment Agreement between Registrant and Paul Chopra,
              effective January 1, 1996...................................
    10.4*     Form of 1995 Stock Option Plan of Registrant and Form of
              Nonstatutory Option Grant Under the Plan....................
    10.8**    Office Lease between TCEP II properties and Registrant dated
              May 8, 1996.................................................
    10.9***   1996 Stock Option Plan of Registrant, as amended and
              restated on June 17, 1997...................................
    11        Computation of Net Income (Loss) Per Share..................
</TABLE>
 
---------------
 
  * Incorporated by reference from Registrant's Statement on Form S-1,
    Registration No. 33-80635.
 ** Incorporated by reference from Registrant's Annual Report for the fiscal
    year ended March 31, 1996 on Form 10-K.
*** Incorporated by reference from Registrant's Quarterly Report for the fiscal
    quarter ended June 30, 1997 on Form 10-Q.
 
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