Table 2

Group 2: study elements captured in external pilot and feasibility studies

Study elementsExternal pilot study (n=48)External feasibility study (n=11)
Assessed
n (%)
Recommended changes n (%)Assessed
n (%)
Recommended changes (n)
Testing recruitment24 (50.0)3 (6.3)8 (72.7)0
Determining sample size and/or number available24 (50.0)1 (2.1)4 (36.4)1 (9.1)
Follow-up/dropout16 (33.3)03 (27.3)0
Hypothesis testing10 (20.8)02 (18.2)0
Resources2 (4.2)01 (9)0
Randomisation7 (14.6)03 (27.3)0
Blinding4 (8.3)1 (2.1)00
Outcome measures10 (20.8)1 (2.1)1 (9.1)0
Control group3 (6.3)000
Data collection6 (12.5)02 (18.2)0
Clinical outcomes12 (25.0)01 (9.1)0
Dose/efficacy/safety14 (29.2)1 (2.1)00
Acceptability17 (35.4)04 (36.4)0
Feasibility20 (41.7)08 (72.7)0
Suggests further study8 (16.6)1 (2.1)1 (9.1)0
Delivery of intervention8 (16.6)2 (4.2)00
Testing/developing materials3 (6.3)01 (9.1)0