%iE%i&%%umd$“a?+ 

FROM VITAL & HEALTH STATISTICS OF THE NATIONAL CENTER FOR HEALTH STATISTICS 

U.S. DEPARTMENT OF HEALTH, EDUCATION, AND WELFARE � Public Health Service I Number22¤ NlardI 22,1978 

Office Visits by Persons Aged 65 and Over:


National Ambulatory Medical Care Survey, United States, 1975’


a 

o 

In 1975 there were an estimated 93 million 

visits made to office-based physicians by persons 

aged 65 years and over. This represents an annual rate of 426 visits per 100 persons per year. 

These and other preliminary data about 

visits by persons 65 years and over are presented 

in this report from the 1975 National Ambulatory Medical Care .Survey (NAMCS). NAMCS is 

a probability sample survey conducted by the 

Division of HeaIth Resources Utilization Statistics of the National Center for Health St@istics. 

A complete description of the background and 

survey methodology is available in an earlier report entitled “NationaI Ambulatory hfedical 

Care Survey: Background and Methodoloo, 

United States, 1967-72.”2 

The reader may find it useful to refer to the 

facsimile of the “Patient Record”, figure 1, in 

Advance Data No. 12 as selected aspects of the 

survey findings are discussed. The “Patient Record” was used by participating physicians to 

record information about their office encounters. 

1This report prepared by Raymond O. Gagnon, Division of Health Resources Utilization Statistics. 

2National Center for Health Statistics: National Ambulatory Medical Care Survey: Background and Methodology, United States, 1967-72, by J. B. Tenney and 

others. Vital and Health Statistics. Series 2-No. 61. 

DHEW Pub. No. (HRA) 76-1335. Health Resources 

Administration. Washington. U.S. Government Printing 

Office, Apr. 1974. 

DATA 

HIGHLIGHTS 

During 1975 there were an estimated 568 

million patient visits to the offices of all physicians within the scope of NANICS. Persons aged 

65 years and over accounted for 93 million, or 

16 percent, of these visits. 

From table 1 the reader can compare office 

visits made by persons in various age-sex groups. 

The visit rate increased considerably with age for 

both sexes, yet the difference between the sexes 

decreased in the oldest age groups. 

It should be noted that in this report the 

descriptors “elderly,” “aged persons, ” and “persons aged 65 years and over” are used synonymously. 

Tables 2-9 describe visits made by persons 

aged 65 years and over according to selected 

characteristi& of the visitor and of the physician. For each characteristic, the visit experience 

of aged persons is compared with that of persons 

under 65. The data show that the visit experience of aged persons differed markedly from 

that of persons under 65. Compared with 

younger patients, the elderly 

.	 Had more return visits for the same 

problems. 

.	 Were twice as likeIy to have a chronic 

condition. 

. Vkited internists more frequently. 
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2 dmcdata 

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Table 1. Annual. rate ot visits to office-based physicians by age and sex of visitors: 

United States, 1975 

Age I 

Sex 

All ages EElzEE 

I Number of visits per 100 persons per year 

Both sexes 273 189 222 275 343 426 255 

Male 222 198 150 191 284 399 205 

Female 322 180 294 356 396 445 305 

lThe base populations used in computing the rates are national estimates published 

by the U.S. Bureau of the Census for the civilian noninstitutionalized population as 

of July 1, 1975, in Series P25 and P26 of Current Population Reports. 

.	 Had asubstantially greater proportion of 

Vi;its when the problem was reportedly 

the physician as being serious or very 

serious. 

.	 Had a much smaller proportion of visits 

when no followup was planned. 

.	 Had an EKG or blood pressure check 

more often. 

.	 Had a much greater proportion of visits 

for diseases of the circulatory system. 

Table 2 shows visits for the two age groups 

in terms of sex, prior visit status, and nature of 

the problem or reason for the visit. Statistics on 

prior visit status reflect more return visits for the 

same problems among the older group. For persons under 65 years of age, 84 percent of the 

visits were return visits and 70 percent of these 

were for the same problem. For persons 65years 

or older, 92 percent of the visits were return 

visits and 83 percent of these were for the same 

problem. 

Also accompanying an increase inage wasan 

increase in the prewdenceo fchronicc onditions. 

It is apparent from table 3, where visits for acute 

and chronic conditions are distributed among 

several age groups, that the proportion of visits 

for chronic conditions increases dramatically 

with age. In addition table 2 shows that the nature of the problem for aged persons was considered to be chronic in 62 percent of the visits; 

for persons under age 65, the problems were 

considered to be chronic in only 31 percent of 

the visits. 

Table 4 shows visits by persons 65 and over 

and persons under 65 according to physician 

specialty and type of practice. The two distributions are very similar except for the proportion 

of visits to internists. For persons 65 and over, 1 @ 
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ackmmda3 

Table 2. Number and percent distribution of office visits made by persons 65 years


and over and percent distribution of office visits made by persons under 65 years by


sex of visitor, prior visit status, and nature of the problem: United States, 1975


Office visit


Sex of visitor, prior visit status, and


nature of the problem 65 years and 65 years Under


over and over 65 years


Percent
 Number in thousands distribution


All visits 93,061 100.0 11OO.O 

Sex of visitor


Female 57,339 61.6 60.2


Male 35,721 38.4 39.8


Prior visit status


Patient seen for first time 7,857 8.4 16.2 

Patient seen before: 

New problem 14,889 16.0 24.9 

Old problem 70,314 75.6 58.9 

Nature of problem


Morbid condition:


Acute condition:


Initial visit 19,603 21.1 33.7 

Followup 11,254 12.1 12.4 

Chronic condition: 

Routine - 43,151 46.4 

FlareuD 14,694 15.8 

Other probiem or reason for visit 4,358 4.7 

1


Based on an estimated 474,540,000 visits.


Table 3. Percent of visits to office-based physicians by age of visitor and selected 

reasons for visit: United States, 1975 

Age of visitor


Reason for visit 

Under 15 15-24 25-44 45-64 65 years All ages years years years years and over 

Percent


Acute conditions 43.9 57.7 46.3 44.1 39.8 33.2


Chronic conditions 36.4 15.6 20.6 30.5 49.1 62.2

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Table 4. Number and percent distribution of office visits made by persons 65 years and 

over and percent distribution of office visits made by persons under 65 years by physician specialty and type of practice: United States, 1975 

Office visit


Physician specialty and type of practice


65 years and


over
 ZzzlIEE 

Number in thousands Percent


distribution


All visits 93,061 100.0 11OO.O 

Physician specialty


General and family practice 42,343 45.5 40.5


Internal medicine 17;925 19.3 9.3


General surgery 7,335


Ophthalmology 6,429 ::;


Cardiovascular diseases 3.177


Urology 3;175 ::: Otolaryngology 2,231 2.4 

Dermatology 2;173 2.3 

Orthopedic surgery 1,750 1.9 

Obstetrics and gynecology 1,132 1.2 

Other specialties 5,388 5.8 

Type of practice 

solo 60,677 65.2 58.8 

0ther2 - 32,383 34.8 41.2 

lBased on an estimated 474,540,000 visits. 

ZIncludes partnership and group Practicesout of every 5 visitsin 1975 was made to an Disposition refers to the physician’s dispointernist compared with about 1 out of 11 for sition of the visit in terms of the seven specific 

persons under 65. alternatives listed in item 11 on the patient 

Table 5 contains data onsenousness ofprob- record. The only differences between the age 

lems and disposition and duration of patient groups 65 and over and under 650ccurred when 

visits. Seriousness refers to the physician’s clini- the final disposition was either “return at a speccal judgment as to the extent of the patient’s ified time” or “no followup planned.” For the 

impairment that might result if no care were group 65 and over the final instructionto “reavailable. About 29 percent of the visits by per- turn at a specified time” occurred in 7 out of 

sons 65 years and over were reported by the every 10 visits compared with 6 out of 10 visits 

physician as being serious or very serious com- for those under 65. On the other hand, ’’no folpared with 17 percent of the visits by persons lowup planned” was the final instruction in 6 -

under 65 years. percent of thev-isits bypersons65 and over; for 

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Table 5. Number and percent distribution of office visits made by persons 65 years and


over and percent distribution of office visits made by persons under 65 years by se­


riousness of the problem and disposition of the patient visit: United States, 1975


Office visit


Seriousness of the problem and disposition


of the patient visit 65 years and


over
 ZzElzIE 

Percent
 Number in thousands distribution


All visits


Seriousness of problem


Not serious


Slightly serious


Serious or very serious


Disposition of visit2


Return at specified time


Return if needed---------------’


No followup planned


P	 Telephone followup planned


Referred to other physician agencY


Admitted to hospital


Returned to referring physician


Duration of visit3


No face-to-face encounter with phy­


sician


1-5 minutes


6-10 minutes


11-15 minutes


16-30 minutes
-


31 minutes or more


lBased on an estimated 474,540,000 visits.


93,061 100.0 11OO.O 

32,560 35.0 51.5 

33,111 35.6 31.7 

27,389 29.4 16.8 

65,198 70.1 57.1 

17.827 19.2 22.9 

5;615 6.0 14.5 

2,836 3.1 3.8 

2,753 3.0 2.8 

2,510 2.7 2.0 

1,018 1.1 0.9 

1,291 1.4 1.2 

11,083 11.9 17.0 

25,078 27.0 32.1 

28,495 30.6 26.0 

22,545 24.2 17.9 

4,568 4.9 5.8 

2percents will add to more than 100 because some patients required more than one


disposition.


jTime spent in face-to-face encounter between physician and patient.


persons under 65, itwas the finalinstructionin


15percent of the visits.


Duration ofvisitrefersto the time thephysi-


T cian spent in face-to-facecontact with the


patient.For the aged the duration ofvisit was 

not much different from that of persons under 

65 years of age. Six out of 10 visits by the 

elderly lasted 11 minutes or more compared


with 5 out of 10 visitsfor persons under 65


years of age.The mean duration oftisitforthe


elderly was 16 minutes; for those under 65 the 

mean was 15 minutes. 
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6 acklncedata �. 

Table 6. Number and percent of office visits made by persons 65 years and over and 

percent of office visits made by persons under 65 years by diagnostic and therapeu- ~ tic services most frequently ordered or provided: United States, 1975


Diagnostic and therapeutic services most


frequently ordered or provided


Diagnostic services


Limited history, exam


Blood pressure check


Clinical lab test


General history, exam


X-ray


EKG-----------------------------------------


Vision test


Endoscopy


Hearing test


Therapeutic services


Drug prescribed


Injection


Medical counseling


Office surgery


Immunization, desensitization ---------------


Psychotherapy, therapeutic listening


Physiotherapy


. 

‘Based on an estimated 93,061,000 visits.


2Based on an estimated 474,540,000” visits-


Table 6 contains data on the diagnostic and 

therapeutic services provided. The distribution 

of visits by diagnostic and therapeutic services 

for persons 65 years and over was not unlike 

that for persons under 65 except fortwoprocedures. Theblood pressure check was rendered to 

persons 65 and overinabout halfthe visits compared with athird of the visits for persons inthe 

age group under 65. In addition, an EKG was 

providedat 7percent ofthetisits bythe elderly 

compared with 3 percent of the visits by persons 

under 65. 

Data on the dia~osis associated with each 

ambulatory visit are shown in table 7 by classes 

of the Eighth Revision International Classification of Diseases, Adapted for Usein the United 

Office visit


Number in thousands


51,200 

44,812 

23,133 

11,039 

7,007 

6,155 

5,620 

1,765 

912 

44,289 

15,654 

11,220 

5,833 

2,603 

2.346 

2;285 

Percent 

55.0 50.6 

48.2 30.2 

24.9 22.5 

11.9 16.5 

7.5 7.3 

M 

1.9 

1.0 

47.6 43.7 

16.8 13.2 

12.1 

6.3 

2.8 

2.5 

2.5 2.2 

States (ICDA).3 .Although the diagnoses renered to persons 65 years and over covered a 

broad spectrumof conditions, fourof theICDA 

classes accounted for more than half (53 percent) of all visits. These are shown in figure 1. 

Diseases of the circulatory system accounted for 

1 out of every 4 visits by older persons compared with 1 out of every 15 visits for persons 

under 65 years. 

3NationalCenterforHealthStatistics: .Eighth Revision International Classification of Diseases, Adapted for 

Use in the United States. PHS Pub. No. 1693.Public 

HealthService. Washington.U.S.GovernmentPrinting@


Office.
1967.

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admdata 7 

Table 7. Number and percent distribution of office visits made by persons 65 years


and over and percent distribution of office visits made by all persons by physician


diagnoses in diagnostic groups: United States, 1975


ICDA group and code for diagnosis


All diagnoses


Infective and parasitic diseases-----OOO-136


Neoplasms----------------------------l4O-239


Endocrine, nutritional, and metabolic


diseases----------------------------24O-279


Diseases of blood and blood forming


organs------------------------------28O-289


Mental disorders---------------------29O-3l5


Diseases of nervous system and sense


organs------------------------------32O-389


Diseases of circulatory system-------39O-458


Diseases of respiratory system-------46O-5l9


Diseases of digestive system---------52O-577


Diseases of genitourinary system-----629-629


Diseases of skin and subcutaneous


tissue------------------------------68O-7O9


Diseases of musculoskeletal system


and connective tissue ---------------710-738


Symptoms and ill-defined conditions--78O-796


Accidents, poisoning, and violence---8O99999


‘Special conditions and examinations


without illness ---------------------YOU-Y13


D~nia~ given as “none” or diagnosis
 -.-----


All other categories4-----------------------


.


Office visit


65 years and 65 years Under
 over and over 65 years


Number in thousands


93,061


1,909


3>862


5,895


1,809


2,353


8,709


24,134


7,776


4,463


5,074


3,346


8,647


3,457


4,191


6,399


879


*157


Percent


distribution


100.0 2100.0 

4.4


2.0


3.9


7.6


6.8


15.3


3.3


6.9


5.3


::: 

7.7


19.9


‘Diagnostic groupings and codes are based on the Eighth Revision International Clas­


sification of=Diseases, Adapted for Use in the United States.


2Based on an estimated 474,540,000 visits.


3Blank diagnosis; noncodable diagnosis; illegible diagnosis.


4280-289, Diseases of the blood and blood-forming organs; 630-678, Complications of


pregnancy, childbirth,and the puerperium; 740-759, Congenital anomalies; 760-779, Cer­


tain causes of perinatal morbidity and mortality.

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8 achanceckta 

gurel. DIAGNOSES ACCOUNTING FOR53PERCENT OF VISITS 

TO OFFICE-BASED PHYSICIANS BY PERSONS 65 AND OVER: 

UNITED STATES, 1975 

30r


Diseases of Diseasesof Diseases of Diseasesof 

nervous system circulatory mspiratow muswloskdetal 

and senseorgam system system system 

Table 8 contains more specific information 

on diamoses. listing the 20 most freauent . ICDA

three-~igit categories of the principal diagnosis 

given by the physician during visits made by persons 65 years and over. The most frequently 

rendered diagnoses are essential benign hypertension, chronic ischemic heart disease, and diabetes mellitus, accounting for 20 percent of all 

the diagnoses. These diagnoses accounted for 

only 5 percent of the visits by persons under 65. 

Table 9 presents data on the.,most frequent 

problems, complaints, or symptoms presented 

by persons 65 years and older to office-based 

physicians. These data reflect the reasons for 

seeking care in the patients’ own words. The 

most frequent reasons given by older people for 

vis it ing office-based physicians were lower 

extremity problems, surgical aftercare, fatigue, 

back problems, and high blood pressure. 

Together these reasons accounted for 20 percent 

of all visits by persons 65 and over compared 

with 14 percent of the visits for persons in the 

age group under 65. 

Table 8. Number, percent, and cumulative percent of office visits made by persons 65

years and over by the 20 most frequent ICDA three-digit categories of principal dia­�

gnosis: United States, 1975 

1 , I


Number
 Percent
 of visits Cumulative
 20 most frequent diagnoses and ICDA codesl in of


visits percent


thousands


i 

i 

5.


6.


Z:


J’:


11.


H :


14. 

15.


16.


17.


18.


19.


20.


Essential benign hypertension----------------4Ol


Chronic ischemic heart disease ---------------4l2


Diabetes mellitus ----------------------------250


Medical and surgical aftercare---------------ylO


Osteoarthritis and allied conditions ---------7l3


Symptomatic heart disease --------------------427


Arthritis, unspecified -----------------------7l5


Cataract 374


Medical or special exam----------------------yO()


Neuroses -------------------------------------300


Glaucoma -------------------------------------375


Other and unspecified anemias----------------285


Emphysema------------------------------------492


Other eczema and dermatitis------------------692


Synovitis, bursitis, and tenosynovitis-------73l


Arteriosclerosis-----------------------------44O


Acute upper respiratory infections of


multiple or unspecified site----------------465


Other diseases of eye ------------------------378


Bronchitis, unqualified ----------------------490


Refractive errors ----------------------------370


6,988 1::; 

4,195 ::; 20.3 

3,883 4.2 24.5 

2,811 3.0 27.5 

2,128 29.8 

1,896 H 31.8 

1,424 1.5 33.3 

1,341 1.4 34.7 

1,336 1.4 36.1 

1,127 1.2 37.3 

1,113 1.2 38.5 

1,108 1.2 39.7 

1,091 40.9 

989 ::: 42.0 

983 1.1 43.1 

952 44.1 

879 k: 45.0 

816 0.9 45.9 

774 0.8 46.7 

7,756 8.3


1 Diagnostic categories and code numbers are based on the Eighth Revision Interna-o
 tional Classification of Diseases, Adapted for Use in the United States.

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Table	 9. Number, percent, and cumulative percent of office visits made by persons 65


years and over by the 20 most frequent patient problems: United States, 1975


Number of Percent
 Cumulative
 20 most frequent patient problems and NAMCS codesl visits in of


thousands visits percent


Progress visits --------------------------980 ,985 13,482 14.5 14.5 

Problems of lower extremity------------------4OO 5>049 19.9 

Surgical aftercare---------------------------986 3,939 ::: 24.1 

Fatigue--------------------------------------OO4 3,875 4.2 28.3 

Problems of back-----------------------------4l5 2,795 3.0 31.3 

High blood pressure--------------------------2O5 2,711 2.9 34.2 

Pain in chest--------------------------------322 2,653 2.9 37.1 

Abdominal pain-------------------------------54O 2,570 2.8 39.9 

Vertigo--------------------------------------O69 2,464 2.7 42.6 

Shortness of breath --------------------------306 2,453 2.6 45.2 

Problems of upper extremity------------------4O5 2,056 2.2 47.4 

Vision dysfunction, except blindness---------7Ol 1,883 2.0 49.4 

General physical examination-----------------9OO 1,759 1.9 51.3 

Visit for medication-------------------------9lO 1,691 1.8 53.1


15. Eye examination------------------------------9O8 1,586 1.7 54.8


16. Cough 311 1,582 1.7 56.5


17. Arthritis-rheumatism-------------------------427 1.278 1.4 57.9


18. Headache-------------------------------------O56 1;257 1.4 59.3


Problems of face, neck -----410 1,157 1.2 

% Diabetes mellitus----------------------------99l 1-1,107 L1.2 I--E? — 

lSymptomatic categories and code number inclusions are based on a symptom classifi­


cation developed for use in NAMCS.


SYMBOLS 

Datanotavailable —-—.-—


CategorynotapplicabIe——-———


Quantityzero-—-———————


Quantitymorethan ObutlessthanO.05—


Figuredoesnotmeetstandards
 of


reliability
 orprecision———


...


0.0


*

� 

10 achncedata 

TECHNICAL NOTES 

SOURCE OF DATA: Data presented in this re- Table 1. Approximate relative standard errors of estimated numbers of office visits 

port were obtained during 1975 through the 

(NAMCS). The target population of NAMCS en- Estimate 

in 

Relative standard 

error in 

compasses office visits within the conterrninous thousands percentage points 

United States made by ambulatory patients to 

physicians who are principally engaged in office 500 .. ... . .... .. .. ... . ... ... . .... .. ... .. .... . . 30.1 

practice. 1,000 . ...... .. .. .... .. ..... . .. ..... .. . .... . . 21.4 

SAMPLE DESIGN: The 1975 NAMCS utilized a 2,000 .. ... ... .. . .... .. . ... .... . ... ... . .... .. 15.3 

multistage probability y design that involved sam- 5,000 .. .... .. .. .. .... .. ...... . .. ... .. .. .... . 

10,000 ... . ... .. . .... .. ... .. .. . . .... .. .. ... . 

10.0 

7.5 

ples of primary sampling units (PSU’S), physi- 30,000 .... .... . .. ... .. .... ... .. .. ... .. . ... . 5.1 

cian practices within PSU’S, and patient visits 100,000 .. ..... ... ... ... .. ... .. . .. .. .. .. ... 4.0 

Nat i onal Ambulatory Medical Care Survey 

550,000 ....... ............................ 3.5 within practices. Within the 87 PSU’S composing 

the first stage of selection, a sample of approxi- Example of use of table: An aggregate of 80,000,000 has a 

mately 3,500 physicians was selected from mas- relative standard error of 4.3 percent or a standard error of 

ter files maintained by the American Medical 3,440,000 (4.3 percent of 80,000,000). 

Association and the American Osteopathic Association. Sampled physicians, randomly assigned 

to 1 of the 52 weeks in the survey year, were Table 11. Approximate standard errors of percentages for estirequested to complete Patient Records (brief en- mated numbers of office visits


counter forms) for a systematic random sample


of office visits taking place within their practice Base of percentage Esti meted percentage _o


during the assigned reporting period. (A fac- (numbar of visits 

1 or 5 or 10or 20 or 30 or in thousands) 50 simile of the Patient Record used is shown in a 99 95 90 80 70 

previous issue of Advance Data From Vital and 

Health Statistics, No. 12, October 12, ,1.977.) 1,000..................... 2.1 4.6 6.3 8.5 9.7 10.6 Additional data concerning physician practice 3,000 ..... ................ 1.2 2.7 3.7 4.9 5.6 6.1 

characteristics such as primary specialty and 5,000 .................... . 0.9 2,1 2.8 3,8 4.3 4.7 

type of practice were obtained during an induc- 10,000 .................. . 0.7 1.5 2.0 2.7 3.1 3.3 

50,000 ............ ....... 0.3 0.7 0.9 1.2 1.4 1.5 tion interview. 100,000 ................. 0.2 0.5 0.6 0.8 1.0 1.1 

A complete description of the survey’s back- 500,000 ........ ......... 0.1 0.2 0.3 0.4 0.4 0.5 

ground and development has been presented in 

an earlier publication in Series 2 of Vital and Examule of use of table: An estimate of 30 ner cent based on 

Health Statistics (No. 61. DHEW Pub. No. an aggreg;te of 75,000,000 has a standard erro; of 1.2 percent. 

(HRA) 76-1335. Health Resources Administration. Washington. U.S. Government Printing 

Office, Apr. 1974). A detailed description of the 

1975 NAMCS design and procedures will be 

presented in future publications. 

SAMPLING ERRORS: Since the estimates for 

this report are based on a sample rather than the 

entire universe, they are subject to sampling variability. The standard error is primarily a measure 

of sampling variability. The relative standard error of an estimate is obtained by dividing the 

standard error of the estimate by the estimate 

itself and is expressed as a percent of the estimate. Relative standard errors of selected aggreThe relative stand?rd error of 30 percent is 4.0 percent (1.2 percent+30 percent). 

gate statistics are shown in table I. The standard


errors appropriate for the estimated percentages


of office visits are shown in table II.


ROUNDING: Aggregate estimates of office visits


presented in the tables are rounded to the near­


est thousand. The rates and percents, however,


were calculated on the basis of original, un­


rounded figures. Due to rounding of percents,


the sum of ~ercentages may not eq&.1 100.0 per-


cent. 0

ZKivancedata 11 

DEFINITIONS: An ambulatory patient is an individual presenting himself for personal health 

services who is neither bedridden nor currently 

admitted to any health care institution on the 

premises. 

An office is a place that the physician identifies as a location for his ambulatory practice. 

Responsibility over time for patient care and 

professional services rendered there generally resides with the individual physician rather than 

an institution. 

A visitis a direct personal exchange between 

an ambulatory patient and a physician or a staff 

member working under the physician’s supervision for the purpose of seeking care and 

rendering health services. 

A physician is a duly licensed doctor of medicine (M.D.) or doctor of osteopathy (D. O.) currently in practice who spends time in caring for 

ambulatory patients at an office location. Excluded from NAIICS are physicians who specialize in anesthesiology, pathology, radiology; 

physicians who are Federally employed; physicians who treat only institutionalized patients; 

physicians employed full time by an institution; 

and physicians who spend no time seeing ambulatory patients. 

Recent Issues of Advance Data F~om Vital and Health Statistics 

No. 21.	 Selected Findings of Dietary Food Consump- No. 18. Episodes of Persons Injured: United States, 

tion Profiles of Persons 1-74 Years of Age in 1975 (Issued: March 7, 1978) 

the United States, 1971-74 (In preparation) 

No. 17. Access to Ambulatory Health Care: United 

No. 20.	 Office Vffits to Obstetrician-Gynecologists: States, 1974 (Issued: February 23, 1978) 

National Ambulatory Medicaf Care Survey, 

United States, 1975 (Issued: March 13, 1978) 

No. 19.	 Exercise and Participation in Sports Among 

Persons 20 Years of Age and Over: United 

States, 1975 (Issued: March 15, 1978) 

A complete list of Advance Data From Vital and Health Statistics is available from the Scientific and Tectilcal 

@ Information Branch. 

GPO 927 190