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Table 2 Characteristics of the drug and non-drug trials

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   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