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Table 4 The incidence of risk factors and perinatal mortality risk

From: Decreasing trend in preterm birth and perinatal mortality, do disparities also decline?

Risk factors Perinatal mortality per 1000 births
 NPer 1000Crude Odds Adjusted odds
*1
Adjusted odds
*2
Total49475.0 (95% CI) (95% CI) (95% CI)
Year  0.96(0.94–0.97)0.96(0.94–0.97)0.96(0.95–0.98)
Parity
 P045.5%5.51.44(1.35–1.54)1.45(1.36–1.55)1.09(1.01–1.17)
 P135.7%3.81.00 1.00 1.00 
 P2+18.8%5.91.56(1.44–1.69)1.38(1.28–1.50)1.35(1.24–1.47)
Maternal age (years)
  < 201.2%6.51.43(1.14–1.79)1.11(0.88–1.39)1.04(0.82–1.31)
 20–2410.0%5.81.27(1.16–1.39)1.11(1.01–1.21)1.07(0.97–1.17)
 25–3468.1%4.51.00 1.00 1.00 
 35–3917.4%5.31.16(1.08–1.25)1.18(1.10–1.28)1.07(0.99–1.16)
  > =403.3%9.02.00(1.77–2.25)1.92(1.70–2.17)1.38(1.21–1.57)
Ethnicity
 Dutch75.6%4.41.00 1.00 1.00 
 Other European4.8%4.91.12(0.98–1.28)1.09(0.95–1.24)1.10(0.96–1.26)
 Mediterranean7.0%6.71.52(1.38–1.68)1.42(1.29–1.57)1.39(1.25–1.55)
 African2.6%10.12.30(2.03–2.61)2.12(1.87–2.42)1.50(1.31–1.72)
 South Asian1.2%6.01.37(1.08–1.72)1.34(1.06–1.69)0.76(0.60–0.97)
 Asian2.6%5.31.19(1.01–1.42)1.17(0.99–1.39)1.08(0.90–1.29)
 other non-Western6.0%7.41.69(1.53–1.87)1.63(1.47–1.80)1.47(1.32–1.63)
Social-Economic status
 Low24.7%5.91.21(1.13–1.29)1.06(0.99–1.14)1.00(0.93–1.08)
 Mid50.5%4.91.00 1.00 1.00 
 High24.8%4.20.86(0.80–0.93)0.86(0.80–0.92)0.92(0.86–0.997)
Intermediate risk factors
 Preterm birth < 37 weeks6.1%95.353.3(50.3–56.5)  25.8(24.3–27.4)
 Congenital anomalies3.1%83.417.2(16.3–18.1)  5.2(4.8–5.6)
 Small gestational age (SGA) P108.8%38.88.68(8.26–9.12)  3.9(3.7–4.2)
  1. Adjusted for:
  2. *1 Age, parity, ethnicity en SES
  3. *2 = Age, parity, ethnicity, SES, prematurity, congenital anomalies and SGA