Table 3

Literature survey: Comparison of studies (n = 54) using the key words feasibility or pilot

Study components

Pilot n = 20

Feasibility n = 34

Chi-squared1

P-value


Sample size

7 (35%)

3 (8%)

5.7

0.028

Hypothesis testing

14 (70%)

25 (74%)

0.78

0.51

Randomization

11 (55%)

8 (24%)

5.5

0.037

Blinding

3 (15%)

3 (9%)

0.48

0.39

Control group

13 (65%)

11 (32%)

5.4

0.020

Further study suggested

16 (80%)

15 (44%)

6.6

0.012


Number of participants Median (IQR) [Range]

62.5 (31, 189) [8, 187777]

125.5 (36, 1005) [5, 12774614]

-1.04*

0.29


1 1 degree of freedom

* z-statistic (Mann-Whitney test)

Arain et al. BMC Medical Research Methodology 2010 10:67   doi:10.1186/1471-2288-10-67

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