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. 2024 Mar 15;27(2):424–475. doi: 10.1007/s10567-024-00469-4

Table 3.

Characteristics of included studies

Total sample
Study (Year)
Country, Recruitment
Design (# arms) Mental health concern M age (range)
F%
Pre N (AR%) Name n (AR%)
App-based (accessed through smartphone/tablet)

 Ravaccia et al. (2022)

UK, School

Mixed-method

(pre-post) (1-arm)

General well-being

NR

64%F

398 (80) Tellmi 398 (80)

 Schueller et al. (2019)

USA, Community

Pilot feasibility trial (pre-post) (1-arm) Mental wellbeing

19.06 (18–24)

65F%

28 (18) Pocket helper + Purple chill + Slumber time 28 (18)

 Sit et al. (2022)

China, University

Exp. (pre-post) (1-arm)

Depression

Anxiety

NR (18–25)

68F%

38 (66) Step-by-step (SbS) 38 (66)

 Sun et al. (2022)

China, Community

RCT (2-arm)

Anxiety

Depression

22.21 (> 18)

73.7F%

114 (13) WeChat mini

Mindfulness-mHealth: 57 (9)

Social support- mHealth: 57 (18)

Combination delivery (e.g., Telehealth and app-based)

Garnefski and Kraaij (2023)

Netherlands, Community

Exp. (pre-post) (1-arm) Depression

24.71 (> 18)

77F%

31 (26) Moodpep 31 (26)

 Hennemann et al. (2022a)

Germany,University

RCT (2-arm) Somatic symptom distress

24.53 (≥ 18)

83F%

156 (13) iSOMA-guided 81 (16)

 Hennemann et al. (2022b)

Germany, University

RCT (2-arm) Somatic symptom distress

24.60 (≥ 18)

83F%

149 (6) iSOMA-guided

iSOMA-guided: 81(0)

iSOMA GoD: 68 (0)

 Klimczak et al. (2023)

USA, University

RCT (3-arm)

Depression

Anxiety

22.53 (≥ 18)

75F%

230 (24) ACT guide

Phone: 77 (22)

Text: 75 (21)

 Lappalainen et al. (2021)

Finland, School

RCT (3-arm)

Depression

Psychological flexibility

15.27 (14–16)

51F%

243 (2) Youth COMPASS iACT-WhatsApp: 80 (0)

 Lappalainen et al. (2023)

Finland, School

RCT (3-arm)

Depression

Psychological flexibility

15.01 (14–16)

67F%

234 (41) Youth COMPASS

Student & virtual coach: 79 (48)

Virtual coach only: 75 (56)

 O'Connor et al. (2020)

Canada, Community

Pilot RCT (2-arm) Anxiety

15.3 (13–17)

90F%

94 (26) Being real, easing anxiety: Tools helping electronically (BREATHE) 36 (0)

 O'Connor et al. (2022)

Canada, Community

RCT (2-arm) Anxiety

16.4 (NR)

72F%

563 (57) Being real, easing anxiety: Tools helping electronically (BREATHE) 258 (66)

 Radomski et al. (2020)

Canada, Community

RCT (2-arm) Anxiety

16.6 (13–17)

71F%

536 (57) Being real, easing anxiety: Tools helping electronically (BREATHE) 258 (67)

 Rodriguez et al. (2021)

China, University

RCT (2-arm) Depression, Anxiety, Stress

23.5 (NR)

74F%

54 (57) MIND 27 (41)

 Stapinski et al. (2021)

Australia, Community

RCT (2-arm) Anxiety, Alcohol use

21.6 (17–24)

67F%

123 (28) Inroads 62 (0)

 van Doorn et al. (2022)

Netherlands, Community

Exp. (pre-post) (2-arm) Perceived stress

22.38 (NR)

100F%

8 (0) ENYOY, Sense-IT 8 (0)
Telehealth (Zoom/videoconferencing software)

 Harra and Vargas (2023)

USA, University

RCT (2-arm) Anxiety, Depression

19.5 (NR)

47F%

45 (29) Unnamed 14(33)

 Novella et al. (2022)

USA, University

RCT (2-arm) Anxiety

19.29 (18–22)

87%F

52 (5) Unnamed 23 (0)
Web-based (accessed through internet browser or internet supported device. e.g., computer, phone)

 Celia et al. (2022)

Italy, University

Exp. (pre-post) (1-arm) Stress, Anxiety, Social maladjustment, Negative affect

22.88 (NR)

65.6F%

32 (0) Unnamed 32 (0)

 Cerutti et al. (2022)

Italy, University

Exp. (pre-post) (1-arm) Depression, Anxiety, Hopelessness, Burnout

23.27 (NR)

78F%

67 (0) Unnamed 67 (0)

 Cook et al. (2019)

UK, University

RCT (3-arm) Worry/rumination

NR (18–24)

83F%

235 (31) RESPOND 82 (39)

 Grudin et al. (2022)

Sweden, Mental health service

RCT (3-arm) Experiential avoidance, Depression

15.4 (13–17)

59F%

32 (0)

Internet behavioral activation

(I-BA)

11 (9)

 Juniar et al. (2022)

Indonesia, University

Feasibility study

(pre-post) (1-arm)

Stress

24.03 (19–42)

85%

68 (63) Rileks 68 (63)

 Karyotaki et al. (2022)

Netherlands, University

RCT (2-arm) Depression, Anxiety

21.91 (≥ 18)

81F%

100 (18) ICare Prevent 48 (17)

 Keinonen et al. (2021)

Finland, University

Exp. (1-arm)

Avoidance

Depression

15 (14–16)

NR

123 (0) Unnamed 123 (0)

 Koltz (2022)

USA, School

Single case design

(pre-post) (1-arm)

Stress

13.5 (12–15)

50F%

4 (0) inSPIRE 4 (0)

 Küchler et al. (2023)

Germany, University

RCT (3-arm) Mental wellbeing

25.77 (> 18 yr)

75F%

386 (48) StudiCare-M 130 (58)

 Pescatello et al. (2021)

USA, University

Exp. (3-arm) Psychological distress

NR (≥ 18 yr)

NR F%

5568 (NR) SilverCloud (SC)

SC:1,247 (NR)

SC + therapy: 527 (NR)

 Peynenburg et al. (2022)

Canada, University

Randomized Factorial Trial (4-arm) Depression, Anxiety

23.73 (17–46)

81F%

277 (30) UniWellbeing MI + Booster: 68 (29)

 Radovic et al. (2021)

USA, Mental health service

RCT (2-arm) Depression, Anxiety

16 (12–19)

76F%

38 (34) Supporting our valued adolescent (SOVA) 18 (22)

 Rice et al. (2020)

Australia, Mental health service

Exp. (pre-post) (1-arm) Social anxiety

19.8 (14–25)

47F%

89 (15) Entourage 89 (15)

 Wahlund^ (2022)

Sweden, NR

Pilot (pre-post) (1-arm) Excessive worry

NR (13–17)

NR F%

13 (8) BIP Worry 13 (8)

^ = Unpublished thesis, ACT acceptance commitment therapy, App application, AR attrition rate, E electronic, Exp experimental, F female, GoD guidance on demand, iACT Internet-based ACT, i-BA Internet-based Behavioral Activation, Incl includes/including, M mean, mHealth mobile health, MI motivational interviewing, N sample size, n subsample size, NR not reported, RCT randomized controlled trial, Yr year