Initial nonresponders had an increased response rate after repeated questionnaire mailings.

Background And Objective: There is a growing evidence base on methods to improve response rates in surveys among patients. This study aimed to determine the additional effect of two intensive follow-up procedures compared to a simple follow-up procedure.

Methods: Randomized controlled trial that compared repeated mailing of the questionnaire and a request to explain nonparticipation with a simple reminder card.

Use of prescribed and non-prescribed medication for dyspepsia.

Objective: To explore patient factors related to the use of prescribed and non-prescribed drugs for dyspepsia in The Netherlands.

Design: Patient survey study.

Setting And Subjects: Questionnaires sent to patients who had a prescription for dyspepsia medication from their general practitioner.