Skip to main content

Advertisement

Table 4 Multivariable logistic regression analysis of prematurity and age for confounding factors (obesity, use of ART, smoking and parity)

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

  PTB < 28 weeks %(n) (aOR 95% CI) PTB < 34 weeks %(n) (aOR 95% CI) PTB < 37 weeks %(n) (aOR 95% CI)
  Spontaneous Iatrogenic PTB Spontaneous Iatrogenic PTB Spontaneous Iatrogenic PTB
< 30 (n 2437) 0.2% (4) 0.1% (2) 0.6% (14) 0.3% (7) 2.4%(58) 1.4% (35)
Ref Ref Ref Ref Ref Ref
30–34 (n 9643) 0.1% (13) 0.1% (7) 0.6%(54) 0.4% (35) 2.4%(231) 1.4%(138)
0.55 (0.17–1.78) 1.63 (0.20–13.32) 0.90 (0.46–1.76) 1.54 (0.60–3.98) 1.03 (0.75–1.43) 1.13 (0.74–1.72)
35–39 (n 9887) 0.2% (18) 0.1% (8) 0.6%(57) 0.5%(45) 2.3%(231) 1.6%(163)
0.76 (0.25–2.42) 1.72 (0.21–14.05) 1.01 (0.51–1.95) 1.69 (0.66–4.36) 0.99 (0.71–1.37) 1.23 (0.81–1.88)
40–44 (n 2807) 0.1% (3) 0.1% (2) 0.4% (11) 0.2% (19) 0.7%(72) 2.3%(65)
0.44 (0.08–2.49) 1.41 (0.12–16.31) 0.53 (0.20–1.40) 2.42 (0.86–6.80) 0.95 (0.64–1.43) 1.54 (0.95–2.48)
≥45 (n 280) 0.4% (1) 0.4% (1) 1.8% (5) 0.7% (2) 6.1% (17)
2.69 (0.22–33.20) 0.56 (0.07–4.72) 3.41 (0.73–15.91) 0.30 (0.07–1.25) 2.62 (1.30–5.27)
  1. aOR adjusted odds ratio. CI confidence interval. N number of. Ref reference group. PTB preterm birth