How different online recruitment methods impact on recruitment rates for the web-based coortesnaweb project: a randomised trial.

ABSTRACT:

Background

The number of web-based E-epidemiologic studies using online recruitment methods is increasing. However, the optimal online recruitment method in terms of maximizing recruitment rates is still unknown. Our aim was to compare the recruitment rates of three online recruitment methods and to describe how these rates differ according to individual's socioeconomic and demographic factors.

Methods

A total of 2394 members of the 1993 Pelotas birth cohort that provided an e-mail address, a Facebook name, and a WhatsApp number during a face-to-face follow-up were randomly allocated to be recruited by e-mail, Facebook or WhatsApp (798 individuals per method). This was a parallel randomised trial applying a block randomisation (block size = 3). Between January and February 2

SUBMITTER: Blumenberg C 

PROVIDER: S-EPMC6585038 | biostudies-literature | 2019 Jun

REPOSITORIES: biostudies-literature