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. 2018 Feb 5;2017(1):191–200. doi: 10.1093/emph/eox016

Table 4.

Multiple regression models of neonatal weight and length on maternal height and pelvic dimensions

Predictor Neonatal length (cm)
 Neonatal weight (g)
Beta SE P r2 Beta SE P r2 Beta SE P r2 Beta SE P r2
Constant 19.1 5.3 <0.0001 0.12 7.7 4.7 0.10 0.35 –3543 1140 0.002 0.15 –6196 939 <0.0001 0.46
Gestational age (w) 0.54 0.11 0.028 0.28 0.10 0.006 142.8 24.6 <0.0001 70.2 20.2 0.001
Maternal height (cm) 0.05 0.02 <0.0001 0.04 0.02 0.035 6.9 5.0 0.16 4.9 4.0 0.2
Neonatal head girth (cm) 0.66 0.07 <0.0001 169.2 14.7 <0.0001
Constant 17.9 5.3 0.001 0.12 7.5 4.7 0.1 0.35 –4108 1121 0.001 0.19 –6524 931 <0.0001 0.47
Gestational age (w) 0.53 0.11 <0.0001 0.28 0.10 0.006 141.6 23.9 <0.0001 77.0 20.2 <0.0001
Maternal height (cm) 0.04 0.02 0.071 0.04 0.02 0.049 3.1 5.0 0.5 2.7 4.0 0.5
Conjugate (cm) 0.11 0.07 0.094 0.03 0.06 0.6 50.6 13.9 <0.0001 29.3 11.4 0.011
Neonatal head girth (cm) 0.65 0.07 <0.0001 160.4 14.7 <0.0001
Constant 18.2 5.3 0.001 0.13 7.6 4.7 0.11 0.35 –3995 1094 <0.0001 0.22 –6412 916 <0.0001 0.49
Gestational age (w) 0.51 0.11 <0.0001 0.28 0.10 0.007 130.6 23.6 <0.0001 71.7 20.0 0.001
Maternal height (cm) 0.05 0.02 0.034 0.04 0.02 0.037 5.9 4.8 0.2 4.3 3.9 0.2
Inter-spinous (cm) 0.11 0.05 0.048 0.03 0.05 0.5 53.7 11.5 <0.0001 33.3 9.5 0.001
Neonatal head girth (cm) 0.65 0.07 <0.0001 156.5 14.6 <0.0001
Constant 18.9 5.3 <0.0001 0.11 7.7 4.7 0.10 0.35 –3721 1106 0.001 0.20 –6244 913 <0.0001 0.49
Gestational age (w) 0.53 0.11 <0.0001 0.28 0.10 0.006 133.9 23.9 <0.0001 66.2 19.7 0.001
Maternal height (cm) 0.05 0.02 0.041 0.04 0.02 0.036 4.0 4.9 0.4 2.8 3.9 0.4
Inter-cristal (cm) 0.05 0.06 0.4 –0.00 0.05 0.9 47.8 12.2 <0.0001 36.3 9.8 <0.0001
Neonatal head girth (cm) 0.66 0.07 <0.0001 163.2 14.3 <0.0001

Shading indicates predictors other than constant that are significant P < 0.05.

Beta, untransformed B-coefficient; SE, standard error of B-coefficient.

Maternal BMI natural log-transformed.

All models adjusted for birth order, by including (when significant P < 0.1) dummy variables for second-born and third+-born status.