Enclosing a pen in a postal questionnaire follow-up to increase response rate: a study within a trial.
Caroline Marie FairhurstGillian ParkinsonCatherine Elizabeth HewittCamila Sofia MaturanaLaura WileyFiona RoseDavid TorgersonJessica Grace Hugill-JonesAlison BoothLaura BissellGarry Alan TewPublished in: NIHR open research (2023)
The inclusion of a pen with the postal 3-month follow-up questionnaire did not have a statistically significant effect on response rate.
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