Table 3.
Individual comparison of risks for caries experience (dmft + DMFT) or active carious lesions (dt + DT) in subsequently birth-ordered children to the first-born child. Risk comparisons are given as odds ratios (OR) with the respective 95% confidence intervals (CI 95%). Models are adjusted for birth order and gender (model I); for birth order, gender and age (model II); or for birth order, gender, age and nationality (model III)
| Comparison of birth orders | Caries experience OR (CI 95%) p value | Active caries OR (CI 95%) p value | ||||
|---|---|---|---|---|---|---|
| Model I | Model II | Model III | Model I | Model II | Model III | |
| 2nd to 1st |
0.83 (0.72–0.97) p = 0.012 |
1.03 (0.86–1.23) p = 0.973 |
1.05 (0.88–1.26) p = 0.868 |
1.53 (1.27–1.84) p < 0.001 |
1.23 (0.99–1.52) p = 0.063 |
1.27 (1.02–1.57) p = 0.024 |
| 3rd to 1st |
0.78 (0.58–1.06) p = 0.148 |
1.07 (0.77–1.50) p = 0.948 |
1.12 (0.80–1.55) p = 0.832 |
2.04 (1.44–2.88) p < 0.001 |
1.47 (1.00–2.15) p = 0.048 |
1.53 (1.05–2.24) p = 0.020 |
| 4th and later-born to 1st |
0.81 (0.37–1.78) p = 0.903 |
1.24 (0.55–2.77) p = 0.905 |
1.32 (0.59–2.95) p = 0.801 |
2.04 (0.82–5.05) p = 0.182 |
1.32 (0.52–3.36) p = 0.872 |
1.42 (0.56–3.61) p = 0.767 |