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 .
Implanon versus medroxyprogesterone acetate: effects on pain scores in patients with symptomatic endometriosis--a pilot study.
BACKGROUND Implanon has been reported to be effective in the treatment of dysmenorrhea . We compared the therapeutic efficacies of depot medroxyprogesterone acetate ( DMPA ) and Implanon with regard to pain relief in women with endometriosis . STUDY DESIGN In a clinical research center at a university hospital , 41 patients with dysmenorrhea , nonmenstrual pelvic pain and dyspareunia associated with histologically proven endometriosis were included in an open , prospect i ve , r and omized , controlled clinical trial . Twenty-one women were assigned by computer-generated r and omization to receive  Implanon , and 20 women to receive DMPA . As main outcome measures of this pilot study , we evaluated pain improvement quantified according to visual analog scale score , side effects , vaginal bleeding patterns , withdrawal rate and overall degree of satisfaction . RESULTS During a follow-up period of 1 year , we ascertained a clear improvement in pain intensity for both treatment options . After 6 months , the average decrease in pain was 68 % in the Implanon group and 53 % in the DMPA group . The side-effects profile and the overall degree of satisfaction after study termination were comparable for both treatment options . CONCLUSION Concerning pain relief , the therapeutic efficacy of the contraceptive implant Implanon is not inferior to that of DMPA in symptomatic 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 .