How to measure the impact of XXXX ? Development and validation of the German PMS-Impact Questionnaire.

@entity1 @entity14052 @entity14256 @entity1109 @entity4987 @entity158 @entity3010
UNASSIGNED: With 75% of @entity1 of reproductive age affected, @entity1109 are very common, ranging from emotional and cognitive to physical symptoms. @entity3010 and @entity14052 can lead to substantial functional interference and psychological distress comparable to that of @entity14256 . The assessment of this impact is required as a part of the diagnostic procedure in the @entity4987 . In the absence of a specific measure, the authors developed the PMS-Impact Questionnaire. A sample of 101 @entity1 reporting severe @entity3010 complaints was assessed with the twenty-two items in the questionnaire during their @entity3010 phase in an ongoing intervention study at the Philipps-University Marburg from August 2013 until January 2015. An exploratory factor analysis revealed a two-factor solution (labeled Psychological Impact and Functional Impact) with 18 items. A Cronbach's alpha of 0.90 for Psychological Impact and of 0.90 for Functional Impact indicated good reliability. Convergent construct validity was demonstrated by moderate to high correlations with the @entity158 Disability Index. Low correlations with the Big Five Inventory-10 indicated good divergent validity. The PMS-Impact Questionnaire was found to be a valid, reliable, and an economic measure to assess the impact of @entity1109 . In future research, cross validations and confirmatory factor analyses should be conducted.
