Table 2.

Overview of the key characteristics of the economic evaluation studies included in this review.

Article author, year, and journal	DHIa type	Target population	Health care setting	Country	Sample size	Economic evaluation (model or trial based)	Follow-up period (trials) or time horizon (models)
Yang et al [24], 2015, Medical Decision Making	Audiovisual consultation	Children presenting to highest triage emergency category	Rural emergency care/pediatric critical care	United States	135	Model based; CEAb	5 years
Chatterton et al [25], 2019, Australian and New Zealand Journal of Psychiatry	Telephone consultation	Children aged 7-17 years with a diagnosed anxiety disorder	Specialist referral centers	Australia and New Zealand	281	Trial based; CEA and CUAc	1 year
Olthuis et al [26], 2018, Journal of Abnormal Child Psychology	Audiovisual and telephone consultation	Primary caregivers of children aged 6 to 12 years with disruptive behavior disorders	Community children’s mental health clinics	Canada	172	Trial based; CEA	22 months
LeFevre et al [27], 2018, JMIR mHealth and uHealth	SMS text messaging	Pregnant women and infants	Maternal and neonatal care	South Africa	356	Model based; CUA	5 years
Jo et al [28], 2021, BMJ Open	SMS text messaging	Pregnant women	Maternal and neonatal care	Bangladesh	1 million	Model based; CUA	10 years
Willcox et al [29], 2019, JMIR	SMS text messaging	Pregnant women, postpartum women, and their children aged <5 years	MNCHd facilities	Ghana	1000	Model based; CUA	10 years
Kawakatsu et al [30], 2020, Vaccine	SMS text messaging	Pregnant women as well as children and their parents	Primary care center	Nigeria	9368	Trial based; CEA	3 months
Jo et al [31], 2019, PLOS ONE	SMS text messaging	Pregnant women	MNCH facilities	Bangladesh	610	Model based; CUA	4 years
Zurovac et al [32], 2012, PLOS ONE	SMS text messaging	Health workers in charge of patients aged <5 years	Pediatric outpatient clinic	Kenya	119	Trial based; CEA	6 months
Modi et al [33], 2020, JMIR mHealth and uHealth	Mobile phone app	Pregnant women and infants	MNCH facilities	India	5754	Model and trial based; CUA	3 years
Bowser et al [34], 2018, Annals of Global Health	Mobile phone app	Pregnant women and neonates	MNCH facilities	Nigeria	339,475	Trial based; CUA	1 year
Prinja et al [35], 2018, Cost Eff and Resource Alloc	Mobile phone app	Pregnant women and neonates	MNCH facilities	India	300,000	Model based; CUA	10 years
Jolstedt et al [36], 2018, Lancet Child Adolesc Health	Web portal	Children aged 8-12 years with a principal anxiety disorder diagnosis	Pediatric mental health centers	Sweden	131	Trial based; CEA and CUA	3 months
De Bruin et al [37], 2016, Sleep	Web portal	Adolescents with insomnia	Mental health specialist centers	Netherlands	62	Trial based; CUA	1 year
Lalouni et al [38], 2019, Clinical Gastroenterol & Hepatology	Web portal	Children aged 8-12 years with functional abdominal pain disorder	Mental health specialist centers	Sweden	90	Trial based; CEA and CUA	1.5 years
Lenhard et al [39], 2017, BMJ Open	Web portal	Adolescents aged 12-17 years with OCDe	Mental health specialist centers	Sweden	67	Trial based; CEA and CUA	3 months
Nordh et al [40], 2021, JAMA Psychiatry	Web portal	Children and adolescents aged 10 to 17 years with diagnosis of SADf and their parents	Mental health specialist centers	Sweden	103	Trial based; CEA and CUA	3 months
Aspvall et al [41], 2021, JAMA Network Open	Web portal	Children and adolescents aged 8 to 17 years with OCD	Mental health specialist centers	Sweden	152	Trial based; CEA and CUA	10-month trial+6-month follow-up
Lee et al [42], 2017, Epidemiology and Psychiatric Sciences	Web portal	Schoolchildren and adolescents aged 11-17 years (subcohort: students with subthreshold depression)	Primary and secondary schools	Australia	23 per class	Model based; CUA	10 years
Sampaio et al [43], 2019, BMJ Open	Web portal	Adolescents aged 13-17 years diagnosed with IBSg	Primary, secondary, and tertiary care clinics	Sweden	101	Trial based; CEA and CUA	10 weeks
Wasil et al [44], 2021, J of Consulting & Clin Psychology	Web portal	Kenyan high school students (regardless of baseline depression symptoms)	High school	Kenya	101	Trial based; CEA	2 weeks
van den Wijngaart et al [45], 2017, Euro. Respiratory Journal	Web-based symptom monitoring	Teenagers (aged 12-16 years) and young children (aged 6-12 years) with asthma and their caregivers	Asthma clinic	Netherlands	210	Trial based; CEA	16 months

^aDHI: digital health intervention.

^bCEA: cost-effectiveness analysis.

^cCUA: cost-utility analysis.

^dMNCH: maternal, newborn, and child health.

^eOCD: obsessive-compulsive disorder.

^fSAD: social anxiety disorder.

^gIBS: irritable bowel syndrome.