| Unadjusted OR (95% CI) | Adjusted OR (95% CI)* | Population attributable fraction |
---|---|---|---|
All PTB | Â | Â | Â |
   Systemic comorbidity | 1.67 (1.64-1.69) | 1.66 (1.63-1.68) | 12.8 |
   Localized comorbidity | 2.23 (2.20-2.27) | 2.27 (2.24-2.31) | 16.9 |
Medically indicated PTB | Â | Â | Â |
   Systemic comorbidity | 4.11 (4.00-4.22) | 4.01 (3.90-4.11) | 21.8 |
   Localized comorbidity | 4.88 (4.76-5.01) | 4.83 (4.71-4.96) | 23.3 |
PPROM †|  |  |  |
   Systemic comorbidity | 1.23 (1.19-1.26) | 1.18 (1.15-1.22) | 8.0 |
   Localized comorbidity | 1.85 (1.80-1.90) | 1.83 (1.78-1.88) | 21.1 |
Spontaneous PTB ‡ |  |  |  |
   Systemic comorbidity | 0.99 (0.97-1.02) | 1.00 (0.97-1.02) | 0 |
   Localized comorbidity | 1.31 (1.28-1.35) | 1.38 (1.34-1.42) | 5.8 |