Table 2 Characteristics of the included trials
From: Estimands in published protocols of randomised trials: urgent improvement needed
Question | Trials (n = 50) |
|---|---|
Journal—no. (%) | |
 Trials | 16 (32%) |
 BMJ Open | 34 (68%) |
Sponsor—no. (%) | |
 Pharmaceutical/for-profit | 4 (8%) |
 Academic/not-for-profit | 46 (92%) |
Crossover trial—no. (%) | 0 (0%) |
Factorial trial—no. (%) | 0 (0%) |
Non-inferiority/equivalence trial—no. (%) | 1 (2%) |
Cluster trial—no. (%) | 7 (14%) |
Intervention type—no. (%) | |
 Pharmacologic | 6 (12%) |
 Surgical | 5 (10%) |
 Psychosocial/behavioural/educational | 18 (36%) |
 Others | 20 (40%) |
 Multiple types | 1 (2%) |
Planned sample size—median (IQR) | 266 (120, 548) |