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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