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Table 1 Results from the online questionnaire

From: Using e-mail recruitment and an online questionnaire to establish effect size: A worked example

Expected consent rate without using the e-PIS

90%

80%

70%

50%

30%

Mean percentage increase experts wanted

6.9

10.7

13.5

20.2

28.9

Standard deviation

3.19

5.61

24.05

8.53

18.13

Median percentage increase wanted

9

10

11

20

25

Inter quartile range

5

5

10

17.5

30

Range of responses seen

0-10

0-20

0-30

0-50

0-70