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Table 3 cORs, aORs, and 95% CIs of infant groups by women’s gestational weight gain

From: Maternal sleep duration and neonatal birth weight: the Japan Environment and Children’s Study

Obstetric outcome

Appropriate GWG

Excessive GWG

LBW infants

SGA infants

LBW infants

SGA infants

cORs and aORs (95% CI)

MSD < 6.0 h

 cORs

1.07 (0.94–1.22)

0.97 (0.82–1.15)

0.92 (0.68–1.24)

0.79 (0.55–1.14)

 aORs

0.98 (0.84–1.13)

0.92 (0.78–1.09)

0.85 (0.61–1.17)

0.75 (0.52–1.08)

MSD 6.0–7.9 h

 

Ref

Ref

Ref

Ref

MSD 8.0–8.9 h

 cORs

0.94 (0.88–1.00)

0.95 (0.88–1.03)

0.86 (0.73–1.00)

1.00 (0.84–1.18)

 aORs

0.99 (0.92–1.06)

0.96 (0.88–1.04)

0.90 (0.76–1.06)

1.00 (0.84–1.19)

MSD 9.0–9.9 h

 cORs

0.83 (0.76–0.90)

0.87 (0.78–0.97)

0.97 (0.80–1.17)

1.08 (0.88–1.33)

 aORs

0.88 (0.80–0.97)

0.87 (0.78–0.97)

1.10 (0.89–1.35)

1.07 (0.87–1.32)

MSD 10.0–12.0 h

 cORs

0.90 (0.79–1.03)

0.96 (0.81–1.13)

1.01 (0.78–1.31)

1.14 (0.85–1.51)

 aORs

0.89 (0.76–1.04)

0.87 (0.76–1.01)

0.92 (0.69–1.23)

1.08 (0.81–1.44)

  1. Abbreviations: GWG gestational weight gain, LBW low birth weight, SGA small for gestational age, MSD maternal sleep duration Ref reference, cORs crude odds ratios, aORs adjusted odds ratios, 95% CIs 95% confidence intervals
  2. Maternal age, body mass index before pregnancy, parity, maternal smoking status, maternal alcohol consumption status, maternal educational status, annual household income, and preterm birth before 37 weeks were used as the confounding factors