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Table 3 Three, 12 and 24 month response rates

From: The effect of postal questionnaire burden on response rate and answer patterns following admission to intensive care: a randomised controlled trial

 

3 months

12 months

24 months

 

Group A

Group B

Group A

Group B

Group A

Group B

Posted (n)

6112

5993

2548

2366

1752

1617

Response (n)

2466

2315

1873

1719

1527

1406

Response Rate (%)

40.3

38.6

73.5

72.7

87.2

87.0

Absolute difference (%)

1.7

0.9

0.2

95% CI

0.0 to 3.5

−1.7 to 3.4

−2.1 to 2.5

Relative Risk

1.03

1.03

1.02

95% CI

1.00 to 1.06

0.94 to 1.13

0.85 to 1.21

p

0.053

0.52

0.878