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Table 3 Regression coefficients for the association between birth weight and temperature at different gestational points (n = 3267)

From: Temperature during pregnancy influences the fetal growth and birth size

Week Univariate Multivariate 1* Multivariate 2** Multivariate 3***
β P value β P value β P value β P value
8 −1.176 0.537 −5.273 0.072 −4.101 0.141 −3.824 0.180
12 1.324 0.504 6.864 0.033 5.334 0.081 5.970 0.052
19 0.545 0.786 5.113 0.023 4.226 0.048 4.733 0.028
24 −2.804 0.151 3.155 0.308 2.364 0.421 1.849 0.541
28 −3.82 0.049 −0.688 0.809 −0.803 0.766 −1.431 0.613
30 −4.156 0.028 −0.596 0.801 −0.343 0.878 −0.973 0.679
Before birth
 6 −4.236 0.022 −1.279 0.495 −1.045 0.557 −1.772 0.342
 4 −2.326 0.205 0.402 0.830 0.398 0.823 0.530 0.775
 2 −0.102 0.956 2.845 0.160 2.264 0.239 3.080 0.123
At birth 0.595 0.747 4.027 0.61 3.229 0.113 3.567 0.860
  1. *Adjusted for gestational week at birth and season
  2. **Adjusted for sex of infant, BMI, mother’s education, parity, season at birth, and gestational week at birth
  3. **Adjusted for precipitation, sex of infant, BMI, mother’s education, parity, season at birth, and gestational week at birth