From: Questions asked and answered in pilot and feasibility randomized controlled trials
 |  | Drug (n = 28) | Non-drug (n = 22) |
---|---|---|---|
Index word in title | pilot | 25 (89%) | 17 (77%) |
 | feasibility | 1 (4%) | 4 (18%) |
 | both | 2 (7%) | 1 (5%) |
Number of centres | single | 18 (64%) | 11 (50%) |
 | multi-centre | 10 (36%) | 9 (41%) |
 | unclear/not stated | 0 | 2 (9%) |
Active arms | 1 | 15 (54%) | 16 (73%) |
 | 2 | 8 | 5 |
 | 3 | 4 | 0 |
 | 4 | 1 | 0 |
 | 12 | 0 | 1 |
Control/placebo arm | Â | 20 (71%) | 18 (82%) |
Any blinding mentioned | 21 (75%) | 7 (32%) | |
Stated to be double blinded | 15 (54%) | 1 (5%) | |
Target sample size | not stated | 18 (64%) | 15 (68%) |
 | stated with no justification | 2 (7%) | 1 (5%) |
 | non-statistical justification | 3 (11%) | 0 |
 | statistical justification | 5 (18%) | 6 (27%) |
Actual sample size | median | 34 | 30.5 |
 | min-max | 10-87 | 6-3318 |
 | sample size not stated | n = 1 | n = 0 |