Table 1 Use of the SW-CRCT design (N = 123)
| Â | Frequency (%) |
|---|---|
Area | |
 Health | 117 (95.1) |
 Education | 3 (2.4) |
 Social | 3 (2.4) |
Country | |
 USA | 20 (16.3) |
 UK | 20 (16.3) |
 Netherlands | 15 (12.2) |
 African | 15 (12.2) |
 Australasian | 12 (9.8) |
 Asian | 10 (8.1) |
 Canada | 9 (7.3) |
 South or Central American | 8 (6.5) |
 Other European | 6 (4.9) |
 France | 5 (4.1) |
 Multiple | 3 (2.4) |
Received industry support | |
 Yes | 6 (4.9) |
 No | 108 (87.8) |
 Unclear | 9 (7.3) |
Stated reasons for use | |
 Everyone receives | 51 (41.5) |
 None stated | 45 (36.6) |
 Logistical or practical | 43 (35.0) |
 Methodological | 15 (12.2) |
 Time effects | 13 (10.6) |
 Other | 10 (8.1) |
 Cluster-level randomization | 9 (7.3) |
 Prevent contamination bias | 8 (6.5) |
 Encourage participation | 7 (5.7) |
 Incorporate randomization | 6 (4.9) |
 Efficiency grounds | 6 (4.9) |
 Social or political acceptability | 3 (2.4) |
 Fine-tune intervention | 3 (2.4) |