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Table 6 Odds ratios for women in the different age groups who had given birth following ART vs. spontaneous pregnancya

From: Evaluation of risk factors’ importance on adverse pregnancy and neonatal outcomes in women aged 40 years or older

  Age group All age groups
≤39 40–44 ≥45 ≥40  
OR (95% CI) OR (95% CI) OR (95% CI) OR (95% CI) OR (95% CI)
Civil status
Married/ cohabiting Reference Reference Reference Reference Reference
Single status at registration 7.51 (5.35–10.53) 4.09 (3.46–4.83) 3.71 (2.28–6.04) 0.73 (3.24–4.29) 4.62 (4.02–5.33)
Parity
 Primiparous Reference Reference Reference Reference Reference
 Multiparous 0.27 (0.25–0.30) 0.21 (0.20–0.23) 0.22 (0.16–0.30) 0.25 (0.24–0.27) 0.24 (0.22–0.25)
Twin
 No Reference Reference Reference Reference Reference
 Yes 9.85 (8.58–11.30) 7.50 (6.87–9.20) 8.02 (5.21–12.35) 7.94 (7.22–8.72) 8.91 (8.06–9.82)
Age group
 ≤ 39 NA NA NA NA Reference
 40–44 NA NA NA NA 3.40 (3.57–4.05)
 ≥ 45 NA NA NA NA 4.72 (4.05–5.50)
Gestational age
 At term, 37–42 weeks Reference Reference Reference Reference Reference
 Post term, > 42 weeks 0.63 (0.23–1.72) 0.92 (0.49–1.75) 1.65 (0.19–14.31) 0.90 (0.54–1.50) 0.86 (0.51–1.44)
 Preterm, 32–36 weeks 1.37 (1.14–1.65) 1.20 (1.00–1.43) 0.95 (0.55–1.66) 1.26 (1.12–1.43) 1.26 (1.12–1.43)
 Very preterm, < 32 weeks 1.57 (0.93–2.64) 1.92 (1.15–3.19) 0.13 (0.02–0.93) 1.47 (1.03–2.10) 1.60 (1.11–2.29)
Birthweight
 Normal birthweight, ≥2500 g Reference Reference Reference Reference Reference
 Low birthweight, 1500 g - 2499 g 1.01 (0.81–1.25) 0.90 (0.72–1.11) 1.62 (0.88–2.99) 1.02 (0.88–1.17) 0.98 (0.85–1.14)
 Very low birthweight, < 1500 g 0.81 (0.56–1.45) 0.59 (0.34–1.02) 4.82 (0.67–34.83) 0.82 (0.56–1.20) 0.70 (0.47–1.04)
Size for gestational age
 AGA1 Reference Reference Reference Reference Reference
 SGA2 1.35 (0.97–1.88) 0.84 (0.64–1.10) 1.54 (0.69–3.42) 1.16 (0.96–1.42) 1.02 (0.83–1.24)
 LGA3 1.27 (0.98–1.64) 1.08 (0.88–1.32) 1.70 (0.92–3.16) 1.22 (1.05–1.43) 1.17 (1.00–1.37)
  1. aAdjusting for all variables presented in Table 4
  2. 1Appropriate for gestational age
  3. 2Small for gestational age
  4. 3Large for gestational age
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BMC Pregnancy and Childbirth

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