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Table 1 Messages associated with each intervention in PROMPTS

From: Randomised study within a trial (SWAT) to evaluate personalised versus standard text message prompts for increasing trial participant response to postal questionnaires (PROMPTS)

PROMPTS text message condition

Wording in message

Control group

From the GRASP Trial: We have just sent you a GRASP questionnaire in the post. We would be extremely grateful if when you receive it, you complete it and return it as soon as you can. Thank you

Intervention group

From the GRASP Trial: [Mr Smith] We have just sent you a GRASP questionnaire in the post. We would be extremely grateful if when you receive it, you complete it and return it as soon as you can. Thank you