Incidence, odds ratios, and 95% confidence intervals for outcome variables in first and second twins
| Variable | No of twin pairs | First twin (%) | Second twin (%) | OR | 95% CI |
|---|---|---|---|---|---|
| RDS, Respiratory distress syndrome; CLD, chronic lung disease; Neuro, adverse neurological findings; OR, odds ratio; 95% CI, 95% confidence interval. | |||||
| Death | 664 | 19.6 | 23.2 | 1.24 | 1.02 to 1.51 |
| RDS | 651 | 65.7 | 74.3 | 1.51 | 1.29 to 1.76 |
| CLD | 434 | 18.4 | 23.5 | 1.36 | 1.11 to 1.66 |
| Neuro | 412 | 18.2 | 21.1 | 1.20 | 0.91 to 1.60 |