Table 1.
Characteristics of the studies included in the qualitative synthesis.
| References | Country | Participants characteristics | Digital health intervention platforms | Data collection | Sample size | Response rate (%) |
|---|---|---|---|---|---|---|
| van der Pligt et al. (31) | Australia | Not reported | Unlimited access to online website, Facebook, smartphone app, group blog, and 3 one-on-one telephone counseling sessions | Interviews (telephone) | 14 | 46 |
| Lim et al. (32) | Australia | Age: 34–35 years % born in Australia: 47–55% Education: 58% University level |
2 phases: group delivery (5 group, and 2 telephone sessions) or telephone delivery (7 telephone sessions) |
Interviews (telephone and face-to-face group) | Group = 136; Telephone = 29 | Group = 48; Telephone = 88 |
| O'Reilly and Laws (33) | Australia | Not reported | Smartphone app (Health eMums) (pilot testing phase—no prescribed intervention dose) | Focus groups | 26 | 40 |
| Walker et al. (34) | US | Age: 31–32 years Ethnicity: 46% White, 21% African-American, 33% Hispanic Education: 8–31% High school graduate or less |
Multi-platform (text messaging, website, email, and videos) (observational study on DHI usage-no prescribed intervention dose) | Posted questionnaire and 2 open-ended questions | 168 | 33 |
| Biediger-Friedman et al. (35) | US | Age: 18–47 years Ethnicity: 7% White, 7% African-American, 82% Hispanic Education: 44% University level |
Smartphone app (prototype testing phase—no prescribed intervention dose) | Focus groups | 61 | 95 |
| Haste et al. (22) | England | Not reported | Website-delivered consultations with dietitians and exercise experts, videos | Interviews | 5 | 31 |
| Nicholson et al. (36) | US | Age: 32 years Ethnicity: 70% White, 13% African-American, 13% Asian, 17% Hispanic Education: 55% University level |
Web-based self-management program combined with text messages and emails | Interviews (face-to-face) | 10 | 44 |
| Vincze et al. (37) | Australia | Age: 32 years Ethnicity: Not reported Education: Not reported |
Video coaching (five individual real-time video consultations, consisting of two consultations with an Accredited Practicing Dietitian, two with an Accredited Exercise Physiologist, and one optional self-selected session with either practitioner) | Interviews (telephone) | 21 | 78 |
| Huda et al. (38) | Bangladesh | Age: 15–44 years Ethnicity: Not reported Education: 9.5% completed high school |
Mobile platform intervention (bi-weekly voice messaging, fortnightly phone calls, and 3 mobile banking cash transfers) | Interviews (face-to-face), surveys and focus groups | 14 | 4 |