Development of a prediction model to aid primary care physicians in early identification of women at high risk of developing endometriosis: cross-sectional study.

Objectives: To identify predictors of disease among a few factors commonly associated with endometriosis and if successful, to combine these to develop a prediction model to aid primary care physicians in early identification of women at high risk of developing endometriosis.

Design: Cross-sectional anonymous postal questionnaire study.

Setting: Women aged 18-45 years recruited from the Norwegian Endometriosis Association and a random sample of women residing in Oslo, Norway.

Lack of cross-cultural validity of the Endometriosis Health Profile-30.

Introduction: 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.