Table 3 Risk of cesarean section based upon gestational weight gain

Gestational weight gain^‡ (13–28 weeks) (z-score)

1.00

1.43 (1.10, 1.86)

1.43 (1.10, 1.86)

1.40 (1.08, 1.82)

1.40 (1.08, 1.83)

Gestational weight gain^‡ (28–40 weeks) (z-score)

1.00

1.06 (0.80, 1.41)

1.12 (0.84, 1.51)

1.13 (0.84, 1.50)

1.13 (0.84, 1.52)

Maternal age (years)

5.57

-

1.18 (0.85, 1.64)

1.16 (0.84, 1.61)

1.16 (0.82, 1.14)

Parity

N/A

-

1.01 (0.86, 1.19)

0.97 (0.82, 1.14)

0.97 (0.67, 1.31)

Estimated weight at 13 weeks (kg)

17.71

-

-

1.51 (1.17, 1.94)

1.51 (1.17, 1.95)

Infant birthweight (g)

493.57

0.97 (0.74, 1.27)