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Timing of data collection of included studies (n = 226)
| Time of data collection | Number of studies (%) |
|---|---|
| Pre-intervention | 3 (1.3) |
| Pre- and during intervention | 5 (2.2) |
| Pre- and post-intervention | 40 (17.7) |
| Pre-, during, and post-intervention | 18 (7.9) |
| During and post-intervention | 29 (12.8) |
| During intervention | 25 (11.1) |
| Post-intervention | 104 (46) |
| Unclear | 2 (0.9) |
| Total | 226 (100) |
