Table 2

Multivariable logistic regression models for stunting at 3 years of age applied to the development data set (n=1015)

Intercept and predictorsCodingβ coefficient* (SE)Multivariable
OR (95% CI)
P value
Birth model—predictors based on maternal characteristics collected during pregnancy up to and including birth, paternal characteristics, and infant characteristics at birth: complete cases (n=876)
Intercept†−2.14 (0.20)
Multigravida1=yes/0=no0.45 (0.22)1.57 (1.01 to 2.43)0.043
Birth weight‡100 g−0.11 (0.03)0.90 (0.85 to 0.95)<0.0001
Maternal height‡1 cm−0.10 (0.02)0.91 (0.87 to 0.95)<0.0001
Average maternal weekly weight gain enrolment to third trimester weight‡100 g−0.18 (0.08)0.83 (0.71 to 0.98)0.028
Paternal height‡1 cm−0.06 (0.02)0.94 (0.91 to 0.97)<0.0001
6-month model—predictors based on maternal characteristics collected during pregnancy up to and including 6 months, paternal characteristics, and infant characteristics up to and including 6 months: complete cases (n=839)
Intercept§−2.15 (0.19)
Male sex1=yes/0=no−1.27 (0.27)0.28 (0.17 to 0.48)<0.0001
Gestational age‡1 week0.13 (0.07)1.14 (1.00 to 1.30)0.049
Infant weight at 6 months‡100 g−0.05 (0.02)0.95 (0.91 to 0.99)0.006
Infant length at 6 months‡1 cm−0.83 (0.10)0.43 (0.36 to 0.53)<0.0001
Maternal height‡1 cm−0.05 (0.03)0.96 (0.91 to 1.00)0.079
Average maternal weekly weight gain enrolment to third trimester weight‡100 g−0.21 (0.10)0.81 (0.66 to 0.99)0.040
Paternal height‡1 cm−0.04 (0.02)0.96 (0.92 to 1.00)0.086
  • CI, Confidence Interval; OR, Odds Ratio; SE, Standard Error

  • *Regression coefficients without adjustment for overfitting.

  • †The intercept can be interpreted as the percentage risk of stunting at 3 years of age for a child who is the first child, with average birth weight (3163 g), whose mother has average height (153.8 cm) and average weekly weight gain (411 g) between week enrolment and third trimester weight, and father with average height (165.8 cm): 100/(1+exp(−intercept))=10.5%.

  • ‡Mean-centred variables.

  • §The intercept can be interpreted as the percentage risk of stunting at 3 years of age for a child who is male, with average gestational age (39 weeks), average weight (7723 g) and length (66.0 cm) at 6 months of age, whose mother has average height (153.8 cm) and average weekly weight gain (411 g) between week enrolment and third trimester weight, and father with average height (165.8 cm): 100/(1+exp(−intercept))=10.4%.