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Table 3 Response rate at 2 years prior to and during the incentives study

From: Evaluation of the effectiveness of an incentive strategy on the questionnaire response rate in parents of premature babies: a randomised controlled Study Within A Trial (SWAT) nested within SIFT

Questionnaire received (at 2 years of age corrected for prematurity) Prior to the incentives study
(n = 1756)
95% confidence interval During the incentives study
(n = 923)
95% confidence interval
Questionnaire received (at 2 years of age corrected for prematurity), n/N (%) 1266/1756 (72.1) (69.9, 74.1) 734/923 (79.5) (76.8, 82.0)