Table 1 Characteristics of trials
Characteristic | Number of trials (%) |
|---|---|
Publication year | Â |
1992-2004 | 29 (40) |
2005-2010 | 44 (60) |
Country | Â |
USA | 17 (23) |
UK | 16 (22) |
Netherlands | 9 (12) |
Canadaa | 7 (10) |
Australia | 5 (7) |
Sweden | 5 (7) |
Others | 14 (19) |
Number of clusters randomised | Â |
  Median (IQR) | 15 (10, 36) |
  Range | 3 to 230 |
Average cluster sizeb | Â |
  Median (IQR) | 26.2 (14.8, 42.9) |
  Range | 3.2 to 201.1 |
Primary focus of research (based on primary outcome) | Â |
  Falls or fractures | 21 (29) |
  Medication use | 13 (18) |
  Quality of Life | 13 (18) |
  Use of restraints | 6 (8) |
  Respiratory | 4 (6) |
  Depression | 2 (3) |
  Other | 14 (19) |