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Table 3 Effect of body mass index before pregnancy on the occurrence of dystocia

From: Gestational weight gain as a risk factor for dystocia during first delivery: a multicenter retrospective cohort study in Japan

BMI category (kg/m2)

 < 18.5 (G1)

18.5 to < 20.0 (G2)

20.0 to < 23.0 (G3)

23.0 to < 25.0 (G4)

25.0 to < 30.0 (G5)

 ≥ 30.0

(G6)

Model1 OR (95% CI)

0.97 (0.53–1.77)

0.76 (0.43–1.33)

Ref

1.16 (0.60–-2.25)

1.74 (0.94–3.24)

3.20 (1.69–6.06)

Model 2 aOR (95% CI)

0.97 (0.52–1.80)

0.72 (0.40–1.28)

Ref

1.12 (0.56–2.22)

1.73 (0.91–3.23)

2.94 (1.50–5.77)

Model 3 aOR (95% CI)

0.97 (0.52–1.79)

0.72 (0.40–1.28)

Ref

1.12 (0.56–2.22)

1.72 (0.91–3.23)

2.95 (1.50–5.81)

  1. BMI Body mass index, OR Odds ratio, aOR adjusted odds ratio, CI Confidence interval, Ref Reference group
  2. Model 1 was calculated by univariate regression analysis, which calculated ORs
  3. Model 2 adjusted for chronic maternal hypertension, maternal smoking, conception by assisted reproductive technology, maternal age (20–29 years as the reference), and uterine myoma
  4. Model 3 adjusted as for Model 2 plus gestational diabetes mellitus
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BMC Pregnancy and Childbirth

ISSN: 1471-2393

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