Table 2.
Methodologic quality, cost, and funding of included studies.
| Study | Social media’s role in this intervention or outcome clearly reported | This role quantifieda | Social media described as effective | Theoretical model application | Conceptual model application | Cost of intervention reported | Funding source reported | Sources of bias reported |
| Garett et al [23] | Yes | No | Yes | No | No | No | Yes | Recall |
| Young et al [24] | Yes | Yes | Yes | No | No | No | Yes | Self-reported |
| Harding et al [25] | Yes | Yes | Yes | No | No | No | Yes | Nonrepresentative of general population owing to internet or social media access |
| Cao et al [26] | Yes | No | Yes | No | No | No | No | None |
| Sap et al [27] | Yes | No | Yes | No | No | No | No | Nonrepresentative of general population owing to internet or social media access; self-reported |
| Cole et al [28] | Yes | Yes | Yes | No | No | No | Yes | None |
| Hutchinson et al [29] | No | No | Yes | Transtheoretical model | No | No | Yes | Nonrepresentative of general population owing to internet or social media access |
| Goldenhersch et al [30] | Yes | Yes | Yes | Contemplation ladder | No | No | Yes | Short follow-up; self-reported |
| Cool et al, 2015 [31] | Yes | Yes | Yes | No | No | No | Yes | None |
| Hamill et al, 2015 [32] | Yes | Yes | Yes | No | No | Yes | Yes | None |
| Jiebing et al [33] | Yes | No | Yes | No | No | No | Yes | None |
| Mo et al [34] | Yes | No | Yes | Theory of planned behavior | No | No | Yes | Self-reported |
| Wu et al [35] | No | No | No | No | No | No | Yes | Nonrepresentative of general population owing to internet or social media access |
| Ahmad et al [36] | Yes | Yes | Yes | Social cognitive theory | Yes | No | Yes | Nonrepresentative of general population owing to internet or social media access; other selection bias |
| Cavalcanti et al [37] | Yes | Yes | Yes | No | No | No | No | Research team was not blinded to randomization |
| Chen et al [38] | No | No | No | COM-Bb and Behavior Change Wheel framework | Yes | No | Yes | Participants and researchers were not blinded |
| Todorovic et al [39] | Yes | No | Yes | No | No | No | Yes | No randomization |
| Chai et al [40] | No | No | No | No | Yes | No | Yes | Lost to follow-up |
| Lwin et al [41] | No | No | No | Protection motivation theory | Yes | No | Yes | Nonrepresentative of general population owing to internet or social media access |
| Pereira et al [42] | Yes | Yes | No | No | No | No | No | Nonrepresentative of general population owing to internet or social media access |
| Gamboa et al [43] | Yes | Yes | Yes | Social cognitive theory | No | No | Yes | Self-reported |
| Januraga et al [44] | Yes | No | No | Technology acceptance model | No | No | Yes | Nonrepresentative of general population owing to internet or social media access |
| Thammasarn and Banchonhattakit [45] | No | No | No | No | No | No | Yes | None |
| He et al [46] | Yes | No | Yes | No | No | No | Yes | None |
| Souza et al [47] | No | No | No | No | No | No | No | None |
| Chiu et al [48] | Yes | No | Yes | No | No | No | No | Self-reported; lost to follow-up; nonrepresentative of general population owing to internet or social media access |
| Chiu et al [49] | Yes | No | No | No | No | No | No | Self-reported; lost to follow-up; nonrepresentative of general population owing to internet or social media access |
| Purdy [50] | Yes | Yes | Yes | No | No | No | Yes | None |
| Parsapure et al [51] | No | No | Yes | No | No | No | Yes | None |
| Wu et al [52] | Yes | No | Yes | No | No | No | Yes | Lost to follow-up |
| Hutchinson et al [53] | No | Yes | No | No | Yes | No | Yes | Self-reported; interviewer bias |
| Diamond-Smith [54] | Yes | Yes | Yes | No | No | No | Yes | Selection bias |
| Chang et al [55] | Yes | Yes | No | No | No | No | No | None |
aQuantified through clicks, shares, comments, or other method of engagement.
bCOM-B: Capability Opportunity Motivation Behavior.