Fig 1.

Flow diagram of the study. A pilot pre-test study was performed in 30 patients to test the POP questionnnaire (PPQ) and to generate the data for calculation of the sample size for the study. The first survey was performed in the first half of 2008, where 296 patients received the PPQ on the first postoperative day and on the day of the surgery. The second survey was performed after the implementation of Quality Management Program in treatment of POP in 294 patients. QMS, quality management system.