title: Pre-notification did not increase response rate in addition to follow-up: a randomized trial.
abstract: OBJECTIVE
  Although there is growing evidence on the effectiveness of pre-notification and follow-up on response rates in patient surveys, no studies report the effectiveness of pre-notification in addition to follow-up. The aim of this study was to determine the effect of a pre-notification by mail on the response rate in a patient survey with follow-up, compared with follow-up or pre-notification only.
  
  
  METHODS
  Randomized trial that compared (1) a combination of pre-notification and follow-up with (2) pre-notification only and (3) follow-up only. The trial was integrated in a survey study among patients, which measured their experiences with general practice cooperatives for out-of-hour care.
  
  
  RESULTS
  Of the total number of 880 patients who received the questionnaire, 45% returned it. No significant effect was found of the combination of pre-notification and follow-up compared with the two other arms of the trial.
  
  
  CONCLUSIONS
  Adding pre-notification to follow-up in a patient survey had no additional effect on the response rate. This finding must be interpreted with respect to the questionnaire and the study population.
authors.affiliation: IQ healthcare, Radboud University Nijmegen Medical Centre, Geert Grooteplein 21, Nijmegen, The Netherlands. hamminka@ggd.rotterdam.nl
authors.forename: Alice
authors.initials: A
authors.lastname: Hammink
authors.forename: Paul
authors.initials: P
authors.lastname: Giesen
authors.forename: Michel
authors.initials: M
authors.lastname: Wensing
mesh_terms: D003625:Data Collection / Q000379:methods* / Q000706:statistics & numerical data; D005500:Follow-Up Studies; D006306:Health Surveys; D006801:Humans; D011786:Quality Control; D011795:Surveys and Questionnaires / Q000592:standards*