At 4 months (telephone survey) | At 8 months (telephone survey) | At 12 months (home visit) | At 36 months (telephone survey) | |||||
---|---|---|---|---|---|---|---|---|
With intervention | Without intervention | With intervention | Without intervention | With intervention | Without intervention | With intervention | Without intervention | |
*Ratio of rate of injury per person year. | ||||||||
†The 12 month rate ratio in the original publication was 0.75 (95% CI 0.58 to 0.96). The discrepancy arises from the method we used to calculate injury visits in this study. In the original analysis, at each four month interval we counted whether or not a family had an injury visit to the doctor and calculated the rate ratio based on this number and not on the total number of injury visits. Due to the 24 month time interval for follow up in the current study, we used the total number of injury visits to calculate all rate ratios. | ||||||||
Number of injuries since last follow up that resulted in a child seeing a doctor | 38 n = 535 | 63 n = 505 | 47 n = 510 | 58 n = 498 | 26 n = 359 | 34 n = 343 | 143 n = 403 | 165 n = 371 |
0–12 month rate ratio* (95% CI) 0.69 (0.54–0.88)† | 12–36 month rate ratio* (95% CI) 0.80 (0.64–1.00) | |||||||
0–36 month rate ratio* (95% CI) 0.74 (0.63–0.87) |