Quality of Life Research, Vol. 24, No. 3, SPECIAL SECTION ON RESPONSE SHIFT AND MISSING DATA (March 2015), pp. 567-573 (7 pages) Purpose Patient-reported health-related quality-of-life (HRQoL) ...

This is a preview. Log in through your library . Abstract We demonstrate the use of piecewise regression as a statistical technique to model ecological thresholds. Recommended procedures for analysis ...

The study protocol (TRN 98-0198-003) was approved by the Ethics Committees of the Universities of Göteborg (for Göteborg and Halmstad), Umeå, Uppsala and Malmö and the Medical Product Agency of Sweden ...