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 .
Postoperative medical treatment of chronic pelvic pain related to severe endometriosis: levonorgestrel-releasing intrauterine system versus gonadotropin-releasing hormone analogue.
OBJECTIVE To compare efficacy of the levonorgestrel-releasing intrauterine system ( LNG-IUS ; Mirena ) with depot GnRH analogue ( GnRH-a ; gosareline acetate ; Zoladex ) on endometriosis-related chronic pelvic pain ( CPP ) in patients with severe endometriosis during 12 months . DESIGN Prospect i ve , r and omized , controlled study . SETTING The reproductive endocrinology unit of a tertiary , research and education hospital . PATIENT(S ) Forty women with severe endometriosis ( revised The American Fertility Society [ AFS ] classification > 40 ) and endometriosis-related CPP and control groups were enrolled in the study . INTERVENTION(S ) The patients were treated with either LNG-IUS ( n = 20 ) or GnRH-a ( n = 20 ) . The GnRH-a dose was repeated every 4 weeks for 24 weeks . MAIN OUTCOME MEASURE(S ) Scores of CPP were evaluated using a visual analogue scale ( VAS ) and total endometriosis severity profile ( TESP ) . RESULT ( S ) The TESP score decreased in the LNG-IUS group at first , third , and sixth month follow-up visits , whereas at the 12th month follow-up visit , the TESP scores were increased to values similar to pretreatment values . Although the VAS score had no significant alteration during the follow-up period in the LNG-IUS group , the GnRH-a group showed a significant decrease in the VAS score and TESP score at the end of 1 year . The LNG-IUS treatment showed a lower patient satisfaction . CONCLUSION ( S ) Both treatment modalities showed comparable effectiveness in the treatment of CPP-related 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 .