Table 1.

Study setup and data collection time points.

Measurement		Study time point
		Baseline—T0	Study year
			3 mo	6 mo	9 mo	1 y (end)
All study participants
	Quarterly phone interviews (measurement A) with study nurse		✓	✓	✓
	Quarterly questionnaire (measurement B)—digital questionnaire via the platform		✓	✓	✓	✓
	End-of-study questionnaire (measurement C)—digital questionnaire via the platform (qualitative and quantitative)		✓a	✓a	✓a	✓
Dropouts only
	Reasons for dropout (measurement D)—direct inquiry by study staff (nonmandatory)		✓a	✓a	✓a	✓a
Study completers only
	Evaluation interview (measurement E)—structured interview with study staff (qualitative)					✓

^aAt the point of study dropout.