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 .
Anastrazole and oral contraceptives: a novel treatment for endometriosis.
OBJECTIVE To establish the use of aromatase inhibitors as a therapeutic option for endometriosis . DESIGN Prospect i ve open-label Food and Drug Administration phase 2 trial with Institutional Review Board approval . SETTING Outpatient tertiary care centers . PATIENT(S ) Fifteen premenopausal patients with documented refractory endometriosis and chronic pelvic pain . INTERVENTION(S ) After a 1-month washout of endometriosis hormone therapies , women took 1 mg anastrazole ( Arimidex ; AstraZeneca , Wilmington , DE ) and one tablet of 20 microg ethinyl estradiol/0.1 mg levonorgestrel ( Alesse ; Wyeth , Madison , NJ ) daily for 6 months . MAIN OUTCOME MEASURE(S ) An analog pain scale recorded pelvic pain in daily diaries and surveys at baseline and after each treatment month . Side effects , blood counts , liver and renal function tests , cholesterol levels , and bone density were monitored . RESULT ( S ) Fourteen of 15 patients achieved significant pain reduction . Median pain scores decreased 55 % after 6 months , while mean pain scores decreased 40 % . Pain reduction comparing each treatment month to baseline achieved statistical significance . Average pain scores began dropping after only 1 treatment month and continued decreasing each additional month . No organ system experienced adverse effects . Estradiol levels were suppressed during treatment . Side effects were mild and improved over time . CONCLUSION ( S ) Fourteen of 15 patients with refractory endometriosis achieved significant pain relief using anastrazole and 20 microg ethinyl estradiol/0.1 mg levonorgestrel with minimal side effects . This treatment for endometriosis is a promising new modality that warrants further investigation
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 .