Prasanna Partha Sarathy
Timing of electronic reminders did not improve trial participant questionnaire response: a randomized trial and meta-analyses
Sarathy, Prasanna Partha; Kottam, Lucksy; Mitchell, Alex; Parker, Adwoa; Brealey, Stephen; Coleman, Elizabeth; Northgraves, Matthew; Torgerson, David; Rangan, Amar; Keding, Ada
Dr Matthew Northgraves M.Northgraves@hull.ac.uk
To assess whether timing of SMS reminders improved postal questionnaire return rates from participants in a randomized controlled trial (RCT).
Study Design and Setting
A Study Within A Trial (SWAT) embedded in a multi-centre RCT evaluating three treatments for frozen shoulder. Participants who provided a mobile telephone number were randomized to either pre-notification SMS on the day of the questionnaire mail-out or post-notification SMS four days following questionnaire mail out for the 3-month follow-up. The primary outcome was the proportion of participants who returned a valid questionnaire. A systematic review was undertaken to identify other embedded trials to perform a meta-analysis.
Of the 269 participants, 122/135 (90.4%) returned a valid questionnaire in the pre-notification arm and 119/134 (88.8%) in the post-notification arm (difference of -1.6%; 95% CI of difference: -8.9%, 5.7%). There was no difference in time to response (HR=1.04; 95% CI: 0.80 to 1.34) or need for additional reminders (OR=0.71; 95% CI: 0.43 to 1.17). Meta-analysis of two RCTs showed no difference in response rates between pre and post-notification reminders (OR=0.78 95% CI: 0.42 to 1.45).
Timing of SMS reminders did not improve response rates, time to response or affect the need for additional reminders.
|Journal Article Type||Article|
|Journal||Journal of Clinical Epidemiology|
|Peer Reviewed||Peer Reviewed|
|APA6 Citation||Sarathy, P. P., Kottam, L., Mitchell, A., Parker, A., Brealey, S., Coleman, E., …Keding, A. (in press). Timing of electronic reminders did not improve trial participant questionnaire response: a randomized trial and meta-analyses. Journal of clinical epidemiology, https://doi.org/10.1016/j.jclinepi.2020.03.001|
|Keywords||Epidemiology; Randomized controlled trial; SMS; text message; retention; study within a trial; meta-analyses|
This file is under embargo until Mar 7, 2021 due to copyright reasons.
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