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