|
Characteristic
|
Number of trials (%)
|
|---|
|
Publication year
| |
|
1992-2004
|
29 (40)
|
|
2005-2010
|
44 (60)
|
|
Country
| |
|
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
| |
|
Median (IQR)
|
15 (10, 36)
|
|
Range
|
3 to 230
|
|
Average cluster sizeb
| |
|
Median (IQR)
|
26.2 (14.8, 42.9)
|
|
Range
|
3.2 to 201.1
|
|
Primary focus of research (based on primary outcome)
| |
|
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)
|
-
a of which two jointly with the USA.
-
b Defined as number of individuals analysed/ number of clusters analysed, and which had 17 missing values, because we couldn’t obtain either the number of individuals or of clusters in the analysis.
