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 .
Effectiveness of the association micronized N-Palmitoylethanolamine (PEA)-transpolydatin in the treatment of chronic pelvic pain related to endometriosis after laparoscopic assessment: a pilot study.
OBJECTIVE Aim of our study was to evaluate the effectiveness of the association between N-Palmitoylethanolamine and transpolydatin in the management of  chronic pelvic pain related to EMS . STUDY DESIGN This was a r and omized , double-blind , parallel-group , placebo-controlled clinical trial involving 61 subjects , su bmi tted to a first line laparoscopic conservative surgery , who were r and omized into 3 groups receiving : group A ( n=21 ) the association N-Palmitoylethanolamine-transpolydatin 400 mg + 40 mg twice a day for 3 months ; group B ( n=20 ) the placebo for 3 months ; group C ( n=20 ) a single course of Celecoxib 200 mg twice a day for 7 consecutive days . Assessment s of the severity of pelvic endometriosis ( pelvic pain , dysmenorrhoea and dyspareunia ) were recorded before and after treatment on a question naire and a 10-point VAS . Differences between groups were verified with Kruskal-Wallis ANOVA for non-parametric multiple comparisons . RESULTS A marked decrease in dysmenorrhoea , dyspareunia and pelvic pain was observed in all groups , and the association between N-Palmitoylethanolamine and transpolydatin result ed to be more effective than placebo ( P<.001 ) . Additionally , the treatment with Celecoxib result ed in a decrease in pelvic pain more effective either than the association N-Palmitoylethanolamine and transpolydatin or placebo . CONCLUSION These preliminary results show that the association between micronized N-Palmitoylethanolamine and transpolydatin is effective in the management of pelvic pain related to endometriosis after laparoscopy . Additionally , this association seems to be safe , shows an optimal control of pain and can be used in patients who are unable to receive other therapies
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 .