Table 1.

Main characteristics of the included studies.

Study design	Authors	Chronic disease	Sample size	Wearable device type	Monitoring period
Quantitative study design	Varas et al., 2018	COPD	n = 33	OMRON Walking Style X Pocket HJ-320e digital pedometer	12 months
	J. Lee et al., 2019	FMS	n = 24	Painmeter (bracelet for reporting the severity of pain)	3 months
	Moor et al., 2019	Sarcoidosis	n = 10	Fitbit Flex 2	4 weeks
	J.-S. Lee et al., 2020	MetS	n = 59	-	12 weeks
	Li et al., 2020	CKD	n = 49	Hearth Rate Smart Wristband	90 days
	Lukkahatai et al., 2021	DM	n = 114	Garmin Vivofit	2 days
	Z. Xie et al., 2021	DM HTN CHF	n = 853	Fitbit, Apple Watch, Garmin Vivofit	-
Qualitative study design	Andersen et al., 2020	CHF	n = 27	Fitbit Alta HR	4–49 weeks
Mixed-method approach (qualitative and quantitative)	Wulfovich et al., 2019	CDs (general)	n = 200	Fitbit, Apple Watch, iFit, JawboneUP, Garmin, Samsung Gear, Nike +	4 weeks
	Bentley et al., 2020	COPD	n = 30	Fitbit	8 weeks

COPD: chronic obstructive pulmonary disease; FMS: fibromyalgia syndrome; CKD: chronic kidney disease; MetS: metabolic syndrome; DM: diabetes mellitus; HTN: hypertension; CHF: chronic heart failure; CDs: chronic diseases.