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Table 2 Univariable logistic regression analysis of obstetric outcomes for the different age groups

From: Impact of aging on obstetric outcomes: defining advanced maternal age in Barcelona

OBSTETRIC OUTCOMES Total n = 25054 < 30 years -Reference group- n = 2437 30–34 years n = 9643 35–39 years n = 9887 40–44 years n = 2807 ≥45 years n = 280
%(n) %(n) %(n) (OR 95% CI) %(n) (OR 95% CI) %(n) (OR 95% CI) %(n) (OR 95% CI)
GD 9.8%(2450) 5.9%(143) 7.9%(758) 1.37 (1.14–1.65) 10.8%(1064) 1.94 (1.62–2.32) 15.4%(431) 2.91 (2.39–3.55) 19.3%(54) 3.83 (2.72–5.39)
PE 1.6%(403) 1.6% (38) 1.5%(140) 0.93 (0.65–1.34) 1.6%(157) 1.02 (0.71–1.46) 1.9%(54) 1.24 (0.82–1.88) 5.0% (14) 3.32 (1.78–6.21)
Late-onset PE 1.2%(309) 1.2% (29) 1.2%(114) 0.99 (0.66–1.50) 1.2%(117) 0.99 (0.66–1.50) 1.5% (41) 1.23 (0.76–1.98) 2.9% (8) 2.44 (1.11–5.40)
Placenta previa 1.3%(321) 0.7% (17) 1.1%(103) 1.54 (0.92–2.57) 1.2%(119) 1.73 (1.04–2.89) 2.3%(65) 3.38 (1.97–5.77) 6.1% (17) 9.20 (4.64–18.24)
C-section 30.4%(7615) 25.2%(615) 26.9%(2597) 1.09 (0.98–1.21) 30.5%(3020) 1.30 (1.18–1.44) 42.1%(1182) 2.16 (1.92–2.43) 71.8%(201) 7.54 (5.72–9.93)
- Emergency C-S 15.9%(3987) 16.4%(400) 15.6%(1509) 0.95 (0.84–1.07) 15.1%(1493) 0.91 (0.80–1.02) 18.1%(508) 1.13 (0.97–1.23) 27.5%(77) 1.93 (1.46–2.56)
- Elective C-S 14.5%(3628) 8.8%(215) 11.3%(1088) 1.31 (1.13–1.53) 15.4%(1527) 1.89 (1.62–2.19) 24.0%(674) 3.27 (2.77–3.85) 44.3%(124) 8.22 (6.25–10.81)
Composite adverse maternal outcome 3.3%(819) 3.2%(77) 3.0%(288) 0.94 (0.73–1.22) 3.3%(328) 1.05 (0.82–1.35) 4.0%(112) 1.27 (0.95–1.71) 5.0% (14) 1.61 (0.90–2.89)
Prolongued hospitalisation 1.0%(247) 0.7% (17) 0.9%(84) 1.23 (0.73–2.07) 1.1%(110) 1.62 (0.97–2.70) 1.1% (30) 1.63 (0.89–2.96) 2.1% (6) 3.69 (1.44–9.46)
Intrahepatic cholestasis of pregnancy 0.8%(189) 0.7% (16) 0.6%(62) 0.98 (0.56–1.70) 0.8%(82) 1.27 (0.74–2.17) 1.0% (27) 1.47 (0.79–2.73) 0.7% (2) 1.09 (0.25–4.76)
PPROM 1.1%(266) 0.9% (21) 1.0%(93) 1.12 (0.70–1.80) 1.1%(106) 1.25 (0.78–1.99) 1.4% (38) 1.58 (0.92–2.70) 2.9% (8) 3.38 (1.49–7.71)
Abruptio placentae 0.3%(67) 0.2% (5) 0.3% (27) 1.37 (0.53–3.55) 0.3% (26) 1.28 (0.49–3.34) 0.3% (9) 1.57 (0.52–4.68)
Chorioamnionitis 0.1% (29) 0.2% (4) 0.1% (11) 0.70 (0.22–2.18) 0.1% (13) 0.80 (0.26–2.46) 0.03% (1) 0.22 (0.24–1.94)
PERINATAL OUTCOMES  
Stillbirth 0.2%(49) 0.3% (8) 0.2% (17) 0.54 (0.23–1.24) 0.2% (18) 0.55 (0.24–1.28) 0.2% (5) 0.54 (0.18–1.66) 0.4% (1) 1.09 (0.14–8.73)
  1. n number of. OR odds ratio. CI confidence interval. GD gestational diabetes. PE preeclampsia. PP placenta previa. C-S caesarian section. PPROM preterm prelabor rupture of membranes