%0 Journal Article
%T Lack of cross
%A Erik Qvigstad
%A Leiv Sandvik
%A Marit Helen Andersen
%A Nina Julie Verket
%A Tom Gunnar Tanbo
%J Journal of Endometriosis and Pelvic Pain Disorders
%@ 2284-0273
%D 2018
%R 10.1177/2284026518780638
%X The Endometriosis Health Profile-30 is a disease-specific patient-reported outcome measure of health-related quality of life. Cross-cultural validation of the Endometriosis Health Profile-30 has been performed for several translated versions. The aim of this study was to evaluate the measurement properties of a Norwegian version Endometriosis Health Profile-30. This study was designed as a cross-sectional anonymous postal questionnaire study. A total of 157 women with endometriosis were included during a period from 2012 to 2013. Women aged 18¨C45£¿years were recruited from the Norwegian Endometriosis Association. Principal components analysis with varimax rotation was used to assess construct validity. Short Form-36 was used to determine convergent validity. Cronbach¡¯s alpha was used to measure internal consistency. Intraclass correlation coefficients and paired t-tests were used to evaluate test¨Cretest reliability. Floor and ceiling effects were estimated. Factor analysis resulted in a three and five-factor model for the core and modular questionnaire, respectively. Factor analysis could not support construct validity of the scales self-image and treatment. The Norwegian version Endometriosis Health Profile-30 demonstrated acceptable internal consistency and test¨Cretest reliability, except for the scale relationship with children. Floor effects were observed for the scales self-image (20.1%), work life (33.9%), relationship with children (34.2%), and medical profession (20.5%). The construct self-image does not seem to be measured appropriately by the Norwegian version Endometriosis Health Profile-30, suggesting a lack of cross-cultural validity of the Endometriosis Health Profile-30. With multinational studies increasing, adequate translation, cross-cultural adaptation, and cross-cultural validation of instruments are essential to ensure equivalence in languages and cultures other than the original
%K Endometriosis
%K Endometriosis Health Profile-30
%K health-related quality of life
%K reliability
%K validity
%U https://journals.sagepub.com/doi/full/10.1177/2284026518780638