Table 2 Characteristics of the included trials
Trials (n = 100) | |
|---|---|
Number of clustersa – median (IQR) | 25 (15 to 44) |
Number of clustersa – number (%) | |
4–9 | 14 (14) |
10–19 | 23 (23) |
20–29 | 18 (18) |
30–39 | 13 (13) |
40–49 | 11 (11) |
50–79 | 7 (7) |
80–99 | 4 (4) |
100 or more | 9 (9) |
Patients per clustera – median (IQR) | 31 (14 to 94) |
Primary outcome – number (%) | |
Continuous | 40 (40) |
Binary | 53 (53) |
Count | 7 (7) |
Accounted for clustering in analysis – number (%) | |
Yes | 86 (86) |
No | 10 (10) |
Unclear | 4 (4) |