RESULTS The instruments most frequently used were single-item VAS and Biberoglu and Behrman pain score , while multidimensional inventories were used in few studies .
The results of clinical studies in CPP are more frequently based on one-dimensional measurements .
RATIONALE Many types of  pain assessment are available to research ers carrying out clinical trials in chronic pelvic pain ( CPP ) , ranging from a single-item scale to multidimensional inventories .
AIM Our objective was to investigate which assessment s of pain are more commonly used in clinical trials on CPP .
Cyproterone acetate versus a continuous monophasic oral contraceptive in the treatment of recurrent pelvic pain after conservative surgery for symptomatic endometriosis.
OBJECTIVE To evaluate the efficacy and safety of cyproterone acetate versus an oral contraceptive in the treatment of endometriosis-associated recurrent pelvic pain . DESIGN R and omized controlled trial . SETTING Academic center . PATIENT(S ) Ninety women with recurrent moderate or severe pelvic pain after conservative surgery for symptomatic endometriosis . INTERVENTION(S ) Six months of continuous treatment with oral cyproterone acetate , 12.5 mg/d , or an oral contraceptive containing ethinyl estradiol , 0.02 mg , and desogestrel , 0.15 mg . MAIN OUTCOME MEASURE(S ) Degree of satisfaction with therapy . RESULT ( S ) Six patients in the cyproterone acetate arm and nine in the oral contraceptive arm withdrew because of side effects ( n = 9 ) , treatment inefficacy ( n = 4 ) , or loss to follow-up ( n = 2 ) . At 6 months , dysmenorrhea , deep dyspareunia , and nonmenstrual pelvic pain scores were substantially reduced , and significant improvements were observed in health-related quality -of-life , psychiatric profile , and sexual satisfaction ; no major between-group differences were seen . Subjective and metabolic side effects were limited . According to an intention-to-treat analysis , 33 of 45 ( 73 % ) of patients in the cyproterone acetate group and 30 of 45 ( 67 % ) in the oral contraceptive group were satisfied with the treatment received . CONCLUSIONS Both cyproterone acetate and a continuous monophasic oral contraceptive were effective , safe , and inexpensive therapy for recurrent pain after conservative surgery for endometriosis
RESULTS The instruments most frequently used were single-item VAS and Biberoglu and Behrman pain score , while multidimensional inventories were used in few studies .
The results of clinical studies in CPP are more frequently based on one-dimensional measurements .
RATIONALE Many types of  pain assessment are available to research ers carrying out clinical trials in chronic pelvic pain ( CPP ) , ranging from a single-item scale to multidimensional inventories .
AIM Our objective was to investigate which assessment s of pain are more commonly used in clinical trials on CPP .