Table 2 Prevalence ratios (PRs) and 95% confidence intervals (CIs) for dental caries in relation to birth conditions in 2055 Japanese children aged 3 years
Prevalence | Crude PR (95% CI) | Adjusted PR*(95% CI) | |
|---|---|---|---|
Low birth weight | |||
No | 395/1885 (21.0%) | 1.00 | 1.00 |
Yes | 31/170 (18.2%) | 0.87 (0.63 − 1.21) | 0.90 (0.66 − 1.24) |
Preterm birth | |||
No | 414/1962 (21.1%) | 1.00 | 1.00 |
Yes | 12/93 (12.9%) | 0.61 (0.36 − 1.04) | 0.60 (0.36 − 1.02) |
Small-for-gestational-age | |||
No | 398/1910 (20.8%) | 1.00 | 1.00 |
Yes | 28/145 (19.3%) | 0.93 (0.66 − 1.31) | 0.95 (0.68 − 1.33) |