Table 3 Multivariate analysis of the association between periodontal status and preterm birth according to mother’s age (years).
From: Periodontal disease and preterm delivery: a nationwide population-based cohort study of Taiwan
Variable | 20 ≤ Age ≤ 25 | 25 < Age ≤ 30 | 30 < Age ≤ 35 | Age > 35 | ||||
|---|---|---|---|---|---|---|---|---|
OR | 95% CI | OR | 95% CI | OR | 95% CI | OR | 95% CI | |
Monthly income | ||||||||
Dependent | 1.00 | – | 1.00 | – | 1.00 | – | 1.00 | – |
< NT$20,000 | 0.97 | 0.95–1.00 | 0.96 | 0.94–0.98 | 0.95 | 0.92–0.97 | 0.98 | 0.93–1.03 |
NT$20,000–$40,000 | 0.94 | 0.92–0.96 | 1.00 | 0.98–1.03 | 1.02 | 0.99–1.05 | 1.07 | 1.01–1.12 |
> NT$40,000 | 1.05 | 0.97–1.13 | 1.14 | 1.11–1.18 | 1.13 | 1.10–1.16 | 1.15 | 1.10–1.21 |
Individual obstetric history | ||||||||
Multifetal pregnancy | 7.37 | 6.77–8.02 | 9.10 | 8.61–9.63 | 9.79 | 9.26–10.35 | 8.92 | 8.10–9.81 |
Placental abnormality | 1.65 | 1.61–1.69 | 1.70 | 1.66–1.73 | 1.79 | 1.74–1.83 | 1.85 | 1.76–1.94 |
Diabetes mellitus complicating pregnancy | 1.50 | 1.46–1.55 | 1.45 | 1.42–1.48 | 1.35 | 1.32–1.38 | 1.23 | 1.18–1.28 |
Vaginal infection | 1.00 | 0.96–1.04 | 1.00 | 0.98–1.03 | 1.01 | 0.98–1.04 | 0.96 | 0.92–1.00 |
Autoimmune disease | 1.20 | 1.13–1.28 | 1.26 | 1.21–1.31 | 1.33 | 1.27–1.39 | 1.38 | 1.29–1.48 |
Hypertension complicating pregnancy | 2.67 | 2.55–2.80 | 3.21 | 3.09–3.32 | 3.40 | 3.26–3.54 | 3.49 | 3.29–3.70 |
Psychological factor(s) | 1.33 | 1.30–1.36 | 1.25 | 1.23–1.28 | 1.21 | 1.19–1.24 | 1.19 | 1.14–1.23 |
Periodontal disease | ||||||||
No PD | 1.00 | – | 1.00 | – | 1.00 | – | 1.00 | – |
Mild PD | 1.00 | 0.98–1.03 | 1.06 | 1.04–1.08 | 1.09 | 1.07–1.11 | 1.03 | 0.99–1.06 |
Advanced PD | 1.06 | 1.03–1.10 | 1.09 | 1.06–1.12 | 1.13 | 1.09–1.17 | 1.09 | 1.02–1.15 |
