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Table 1 Characteristics of RCTs (n = 100)

From: Reporting of sex and gender in randomized controlled trials in Canada: a cross-sectional methods study

Study characteristics Single-sex RCTs (n = 12) Mixed-sex RCTs (n = 88) Total (100)
N (%) unless otherwise specified N (%) unless otherwise specified N (%) unless otherwise specified
First author Canadian 11 88 99 (99%)
Last author Canadian 12 81 93 (93%)
Sample size (randomized) 103 (median) Range (20–1466) 107 (median) Range (12–6085) 107 (median) range (12–6085)
Reports recruitment methods 7 (58%) 43 (49%) 50 (50%)
Cluster RCTs 1 (8%) 8 (9%) 9 (9%)
Type of intervention Pharmacological 5 (42%) 32 (36%) 37 (37%)
Non-pharmacological 7 (58%) 45 (51%) 52 (52%)
Surgical 0 (0%) 6 (7%) 6 (6%)
Organizational 0 (0%) 5 (6%) 5 (5%)
Multi-site Within Canada 3 (25%) 24 (27%) 27 (27%)
Outside of Canada (includes Canada) 0 (0%) 13 (15%) 13 (13%)
Outside of Canada (not including Canada) 0 (0%) 1 (1%) 1 (1%)
Region NRa 0 (0%) 1 (1%) 1 (1%)
Single-site Within Canada 8 (67%) 47 (53%) 55 (55%)
Outside of Canada 1 (8%) 1 (1%) 2 (2%)
Region NR 0 (0%) 1 (1%) 1 (1%)
Canadian funding Yes 9 (75%) 59 (67%) 68 (68%)
No 0 (0%) 13 (15%) 13 (13%)
NR 3 (25%) 16 (18%) 19 (19%)
Type of funding Non-profit 3 (25%) 34 (39%) 37 (37%)
Government 4 (33%) 18 (20%) 22 (22%)
Industry 0 (0%) 10 (11%) 10 (10%)
Non-profit + government 2 (17%) 6 (7%) 8 (8%)
Non-profit + industry 0 (0%) 2 (2%) 2 (2%)
Government + industry 0 (0%) 2 (2%) 2 (2%)
Not reported 3 (25%) 16 (18%) 19 (19%)
  1. a NR not reported. No information was provided