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 .
Estroprogestin vs. gonadotrophin agonists plus estroprogestin in the treatment of endometriosis-related pelvic pain: a randomized trial. Gruppo Italiano per lo Studio dell'Endometriosi.
OBJECTIVE This is a r and omized clinical trial comparing estroprogestin ( E/P ) pill given for 12 months vs. gonadotrophin releasing hormone agonist ( GNRHa ) given for 4 months followed by E/P pill treatment for 8 months in the relief of  endometriosis-related pelvic pain . METHODS Eligible for the study were women with laparoscopically confirmed endometriosis and pelvic pain lasting 3 - 12 months after diagnosis . Eligible women were r and omly assigned to treatment with E/P pill ( gestroden 0.75 mg and ethynlestradiol 0.03 mg ) for 12 months ( 47 patients ) vs. tryptorelin 3.75 mg slow release every 28 days for 4 months followed by E/P pill for 8 months ( 55 patients ) . RESULTS At baseline , dysmenorrhea was reported in 46 women allocated to E/P pill only ( 97.9 % ) , and in all the 55 women allocated to GNRHa+E/P pill . The corresponding value at the 12 months follow-up visit was 14 subjects ( 35.9 % ) and 16 subjects ( 34.8 % ) . The baseline median values of the multidimensional and analog scale were for dysmenorrhea 4 and 6 in the EP only and 3 and 6 in the GNRHa+E/P group . The corresponding value at the 12 months follow-up visit were 2 and 6 and 0 and 5 . Non-menstrual pain was reported , respectively , at baseline and 12 month visit by 46 ( 97.9 % ) and 15 ( 38.5 % ) subjects in the E/P pill group and 49 ( 89.1 % ) and 17 ( 37.0 % ) of the GNRHa+E/P pill one . The baseline median values of the multidimensional and analog scale were for non-menstrual pain 3 and 5 in the E/P only and 2 and 6 in the GNRHa+E/P group . The corresponding values at the 12 month follow-up visit were 0 and 4 and 0 and 4 . These differences between the two groups were not statistically significant . CONCLUSIONS 1 year after r and omization , the two treatment schedules show similar relief of pelvic pain in women with 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 .