Table 1.

Characteristics of the included studies according to the type of eHealth application.

References	Country	Sample ( N )		Type of DM	Type of app eHealth	Age (M, SD)	Gender (% female sex)	Sample recruitment	Depression assessment and criteria	Glycemic control	Other variables
		TG (n)	CG (n)
Nobis et al. (2015) and Ebert et al. (2017)	Germany	256		T2DM or T1DM	Web-based	51 (12)	63%	Online and offline advertisement	CES-D ≥23 SCID-I	HbA1c	PAID, HADS, AADQ, DSMQ, CSQ-8
		129	127
Newby et al. (2017)	Australia	90		T2DM or T1DM	Web-based	46.7 (12.6)	64%	Online advertisements and flyers in medical settings	MDD PHQ (5–23)	HbA1c	PAID, K-10, SF-12, GAD-7, PHQ-15, MINI
		41	49
Clarke et al. (2019) and Baldwin et al. (2020)	Australia	723		T2DM	Web-based	57.7 (10.6)	60.4%	Online advertisements, community organizations, health professionals	PHQ <19	HbA1c	WAS, DDS, GAD, SMP-T2D
		368	355
Van Bastelaar et al. (2011, 2012)	Netherlands	255		T2DM or T1DM	Web-based	50 (12)	61%	Advertisements	CES-D ≥16	HbA1c	PAID
		125	130
Piette et al. (2011)	United States	291		T2DM	Telephone	56 (10.1)	51.1%	Community-university-and VA healthcare system	BDI ≥14	HbA1c	Blood pressure, physical activity (pedometer), Brief Cope, Perceived Competence Scale, Morisky medication adherence scale y SF-12
		145	146
Naik et al. (2019)	United States	255		T2DM	Telephone	61.9 (8.3)	10.2%	Health care system (MEDVAMC) and outpatient clinics	PHQ-9 ≥10	HbA1c
		136	89
Egede et al. (2018)	United States	90		T2DM	Videocall	63.1 (4.2)	2.2%	Health care system (MEDVAMC) and outpatient clinics	MDD (DSM-IV)	HbA1c	BAI, GDS
		43	47

TG, Treatment Group; CG, Control/Comparison Group; M, Mean; SD, Standard Deviation; T1DM or T2DM, Type 1 and 2 Diabetes Mellitus; HbA1c, glycosylated hemoglobin; MDD, Major Depressive Disorder. For measurement acronym's meaning, see the List of nomenclatures section.