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

From: Stepped wedge cluster randomized controlled trial designs: a review of reporting quality and design features

  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)