| RR(95 % CI) | |||
---|---|---|---|---|
 | 9 °C | 12.5 °C | 29.9 °C | 30.7 °C |
All PTBs | ||||
 Lag0 | 1.54(1.36–1.75)* | 1.49(1.35–1.63)* | 0.95(0.87–1.02) | 0.96(0.88–1.05) |
 Lag5 | 1.03(1.00–1.07)* | 1.05(1.03–1.07)* | 0.99(0.98–1.01) | 1.00(0.98–1.02) |
 Lag10 | 1.00(0.97–1.02) | 1.01(0.99–1.02) | 0.99(0.97–1.00)* | 0.98(0.97–1.00)* |
 Lag15 | 0.99(0.97–1.01) | 1.01(1.00–1.02)* | 0.99(0.98–1.00)* | 0.98(0.97–0.99)* |
 Lag20 | 1.00(0.98–1.01) | 1.01(1.00–1.02)* | 0.99(0.98–1.00)* | 0.98(0.97–0.99)* |
 Lag25 | 1.01(1.00–1.03)* | 1.01(1.00–1.02)* | 0.99(0.98–1.00)* | 0.98(0.97–0.99)* |
 Lag30 | 1.04(1.00–1.07)* | 1.01(0.99–1.03) | 0.99(0.97–1.00)* | 0.98(0.96–1.00)* |
 Cumul | 1.72(1.28–2.33)* | 1.96(1.60–2.39)* | 0.69(0.60–0.80)* | 0.62(0.52–0.74)* |
Maternal age 15 ~ 19 group PTBs | ||||
 Lag0 | 1.50(0.85–2.67) | 1.62(1.06–2.49)* | 1.03(0.74–1.42) | 0.96(0.66–1.40) |
 Lag5 | 1.12(0.97–1.29) | 1.07(0.98–1.17) | 1.00(0.93–1.07) | 1.01(0.93–1.10) |
 Lag10 | 1.00(0.90–1.12) | 1.01(0.95–1.07) | 0.97(0.93–1.02) | 0.98(0.92–1.04) |
 Lag15 | 0.97(0.89–1.06) | 1.00(0.96–1.05) | 1.00(0.97–1.04) | 1.01(0.96–1.05) |
 Lag20 | 0.98(0.90–1.07) | 1.00(0.96–1.05) | 1.02(0.98–1.05) | 1.01(0.97–1.06) |
 Lag25 | 1.02(0.95–1.10) | 1.01(0.97–1.06) | 1.01(0.98–1.05) | 1.00(0.96–1.04) |
 Lag30 | 1.07(0.92–1.25) | 1.02(0.93–1.12) | 1.01(0.94–1.08) | 0.98(0.90–1.07) |
 Cumul | 3.72(0.95–14.60) | 2.74(1.15–6.52)* | 1.04(0.56–1.94) | 0.93(0.43–2.00) |
Maternal age 20 ~ 34 group PTBs | ||||
 Lag0 | 1.61(1.40–1.85)* | 1.54(1.39–1.71)* | 0.95(0.87–1.03) | 0.98(0.89–1.08) |
 Lag5 | 1.03(1.00–1.07)* | 1.05(1.02–1.07)* | 0.99(0.97–1.01) | 0.99(0.97–1.01) |
 Lag10 | 1.00(0.98–1.03) | 1.01(1.00–1.03)* | 0.98(0.97–1.00)* | 0.98(0.97–1.00)* |
 Lag15 | 0.99(0.97–1.01) | 1.01(1.00–1.02)* | 0.99(0.98–1.00)* | 0.98(0.97–0.99)* |
 Lag20 | 0.99(0.97–1.01) | 1.01(1.00–1.02)* | 0.99(0.98–1.00)* | 0.98(0.97–0.99)* |
 Lag25 | 1.01(0.99–1.03) | 1.01(1.00–1.02)* | 0.99(0.98–1.00)* | 0.98(0.97–0.99)* |
 Lag30 | 1.03(1.00–1.07)* | 1.01(0.98–1.03) | 0.98(0.97–1.00)* | 0.98(0.96–1.00)* |
 Cumul | 1.74(1.25–2.42)* | 2.02(1.63–2.51)* | 0.70(0.60–0.82)* | 0.64(0.53–0.78)* |
Maternal age 35 ~ 49 group PTBs | ||||
 Lag0 | 1.53(1.10–2.13)* | 1.49(1.16–1.91)* | 0.92(0.75–1.13) | 0.94(0.75–1.20) |
 Lag5 | 1.05(0.97–1.14) | 1.09(1.04–1.15)* | 1.02(0.98–1.07) | 1.01(0.96–1.06) |
 Lag10 | 0.94(0.88–1.00)* | 1.00(0.96–1.03) | 1.00(0.96–1.03) | 0.99(0.95–1.03) |
 Lag15 | 0.99(0.94–1.04) | 1.01(0.98–1.04) | 0.98(0.96–1.01) | 0.98(0.95–1.01) |
 Lag20 | 1.02(0.97–1.07) | 1.02(0.99–1.05) | 0.98(0.96–1.00)* | 0.98(0.95–1.01) |
 Lag25 | 1.03(0.99–1.08) | 1.01(0.98–1.04) | 0.99(0.97–1.01) | 0.99(0.96–1.01) |
 Lag30 | 1.04(0.95–1.14) | 1.00(0.95–1.05) | 1.00(0.95–1.04) | 1.00(0.95–1.05) |
 Cumul | 1.86(0.86–4.04) | 2.27(1.36–3.79)* | 0.66(0.45–0.98)* | 0.57(0.36–0.92)* |