Below IOM GWG a | Above IOM GWG a | |||
---|---|---|---|---|
Maternal Outcome | Unadjusted Analyses | Adjusted Analyses b | Unadjusted Analyses | Adjusted Analyses b |
OR (95% CI) | OR (95% CI) | OR (95% CI) | OR (95% CI) | |
Gestational age at delivery, weeks c | −0.28 (−0.66, 0.10) | −0.34 (−0.76, 0.07) | −0.10 (−0.47, 0.27) | 0.01 (−0.39, 0.41) |
PTB <37 weeks | ||||
Overall | 1.34 (0.94, 1.91) | 1.28 (0.86, 1.93) | 1.19 (0.84, 1.68) | 1.09 (0.73, 1.62) |
Spontaneous | 1.22 (0.80, 1.85) | 1.16 (0.71, 1.90) | 0.81 (0.53, 1.26) | 0.78 (0.47, 1.30) |
Indicated | 1.23 (0.82, 1.84) | 1.20 (0.76, 1.91) | 1.46 (0.99, 2.15) | 1.34 (0.86, 2.09) |
Labour induction | 1.36 (0.93, 2.00) | 1.54 (0.99, 2.39) | 1.62 (1.12, 2.34) | 1.65 (1.08, 2.53) |
Mode of delivery | ||||
Vaginal birth (unassisted) | 1.48 (1.04, 2.12) | 1.47 (0.96, 2.25) | 0.91 (0.64, 1.30) | 1.03 (0.67, 1.56) |
Forceps/ vacuum | 0.75 (0.37, 1.53) | 0.91 (0.40, 2.09) | 0.74 (0.37, 1.48) | 0.73 (0.32, 1.67) |
Caesarean section | 0.73 (0.51, 1.04) | 0.71 (0.46, 1.08) | 1.18 (0.84, 1.67) | 1.07 (0.71, 1.61) |
Postpartum haemorrhage | 1.08 (0.70, 1.67) | 1.10 (0.67, 1.81) | 0.99 (0.64, 1.53) | 1.01 (0.62, 1.63) |
Length of stay, days c | −0.30 (−0.60, −0.01) | −0.35 (−0.68, −0.02) | 0.03 (−0.25, 0.32) | −0.04 (−0.36, 0.28) |