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Frequency distribution by study design among the included studies
| Study frequency distribution by study design | ||
|---|---|---|
| Design | Absolute frequency | Relative frequency (%) |
| RCT | 14 | 45 |
| RNCT | 3 | 10 |
| NRCT | 3 | 10 |
| NRNCT | 4 | 13 |
| PROSP | 7 | 22 |
| TOTAL | 31 | 100 |
| ARMS | 74 | |
| TIME POINTS | 223 | |
RCT: randomised controlled trial; RNCT: randomised non‐controlled trial; NRCT: non‐randomised controlled trial; NRNCT: non‐randomised non‐controlled trial; PROSP: prospective study.
