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Frequencies of intervention categories in the primary studies (N=321).
| Primary studies found in review | Frequency, n (%) |
| 3D or augmented reality | 1 (0.3) |
| Video gaming | 4 (1.2) |
| Videoconferencing | 14 (4.4) |
| Robotics | 22 (6.9) |
| Telecare | 34 (10.6) |
| SNSa | 61 (19) |
| Computer training | 66 (20.6) |
| ICTb | 119 (37.1) |
aSNS: social networking site.
bICT: information and communications technology.
