Temperature during pregnancy influences the fetal growth and birth size

Table 5 Regression coefficients for the association between birth length and temperature at different gestational points (n = 3267)

Week	Univariate		Multivariate 1*		Multivariate 2**		Multivariate 3***
Week	β	P value	β	P value	β	P value	β	P value
8	−0.049	<0.001	−0.051	0.001	−0.045	0.002	−0.041	0.005
12	−0.044	<0.001	−0.001	0.937	−0.003	0.842	0.002	0.903
19	−0.032	0.002	0.008	0.513	0.005	0.632	0.003	0.801
24	−0.024	0.022	0.007	0.653	0.004	0.815	−0.010	0.544
28	−0.008	0.454	0.018	0.234	0.015	0.295	0.004	0.804
30	−0.001	0.918	0.020	0.103	0.019	0.113	0.011	0.382
Before birth
6	0.012	0.209	0.019	0.054	0.019	0.045	0.012	0.200
4	0.031	0.002	0.032	0.001	0.032	0.001	0.026	0.007
2	0.044	<0.001	0.046	<0.001	0.042	<0.001	0.042	<0.001
At birth	0.050	<0.001	0.056	<0.001	0.051	<0.001	0.051	<0.001

*Adjusted for gestational week at birth and season at birth
**Adjusted for sex of infant, BMI, mother’s education, parity, season at birth, and gestational week at birth
***Adjusted for precipitation, sex of infant, BMI, mother’s education, parity, season at birth, and gestational week at birth

ISSN: 1349-4147