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Table 1 Use of the SW-CRCT design (N = 123)
| 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) |
