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Table 2 Literature survey: Frequency of methodological components appearing in pilot or feasibility studies of interventions (n = 261) in 2007-8

From: What is a pilot or feasibility study? A review of current practice and editorial policy

  n (%)
Sample size calculation 9 (35%)
Hypothesis testing 21 (81%)
Randomization 16 (62%)
Blinding 5 (19%)
Control group 18 (69%)
Further study suggested 21 (81%)
Median number of participants (IQR) 76 [8, 1299]
  1. 1Pilot studies = 14 Feasibility studies = 12