Participatory development of an mHealth intervention delivered in general practice to increase physical activity and reduce sedentary behaviour of patients with prediabetes and type 2 diabetes (ENERGISED)

Table 2 Overview of text messages comprised in the intervention and their triggering rules

Text message type	Day	Maximum number per day	Time window	Trigger	Probability^a of being dispatched
Walk Faster	Daily	2 (> 60 min in between)	8 am– 8 pm	5 min of 60–100 steps/min	50%
Walk Faster - Adapted^b	Daily	1	8 am– 8 pm	Randomly within the time window	15%
Stand Up	Daily	1	4 pm– 8 pm	30 min of 0 steps/min and recorded heart rate	50%
Stand Up - Adapted^c	Daily	1	4 pm– 8 pm	Randomly within the time window	15%
Goal Review	Friday	1	8 pm– 10 pm	Randomly within the time window	50%
Feedback and Encouragement	Sunday	1	6 pm– 8 pm	Randomly within the time window	50%
Action Plan Reminder	Individual	1	Individual	Randomly within the time window	50%
Health Education	Tuesday	1	6 pm– 8 pm	Randomly within the time window	50%

^a Probability that a triggered message is actually dispatched, i.e., sent to the patient. ^b The adapted Walk Faster messages are only sent to patients in groups B and C who do not receive just-in-time Walk Faster messages due to irregularity of their Fitbit syncing pattern. ^c The adapted Stand Up messages are only sent to patients in group C who do not receive just-in-time Stand Up messages due to none or very limited syncing of their Fitbit tracker

ISSN: 1471-2458