The association between indoor temperature and body mass index in children: the PIAMA birth cohort study

BMC Public Health

Table 4 Association between the use of heating in the bedroom (yes versus no ¹ ) and BMI

	3 months	1 year	2 years	3 years	4 years	5 years	6 years	7 years	8 years	11 years	Overall
	β ²	β ²	β ²	β ²	β ²	β ²	β ²	β ²	β ²	β ²	β ²
	(95% CI)	(95% CI)	(95% CI)	(95% CI)	(95% CI)	(95% CI)	(95% CI)	(95% CI)	(95% CI)	(95% CI)	(95% CI)
Crude
Girls	-0.02	0.01	-0.03	-0.06	-0.11	-0.16*	-0.17*	-0.14*	-0.08	-0.11	-0.07
	(-0.14,0.10)	(-0.10,0.12)	(-0.15,0.08)	(-0.19,0.06)	(-0.23,0.01)	(-0.29,-0.03)	(-0.29,-0.04)	(-0.25,-0.03)	(-0.19,0.03)	(-0.22,0.01)	(-0.15,0.01)
Boys	-0.08	0.13*	0.04	0.04	-0.01	0.03	0.01	0.00	0.08	0.07	0.03
	(-0.20,0.03)	(0.03,0.23)	(-0.06,0.14)	(-0.06,0.14)	(-0.12,0.09)	(-0.09,0.14)	(-0.10,0.12)	(-0.11,0.11)	(-0.02,0.18)	(-0.04,0.18)	(-0.04,0.10)
Adjusted ³
Girls	0.00	0.03	-0.01	-0.04	-0.09	-0.13*	-0.14*	-0.12*	-0.05	-0.08	-0.05
	(-0.12,0.11)	(-0.07,0.14)	(-0.12,0.11)	(-0.16,0.08)	(-0.20,0.03)	(-0.26,0.00)	(-0.26,-0.02)	(-0.22,-0.01)	(-0.16,0.05)	(-0.19,0.04)	(-0.12,0.03)
Boys	-0.07	0.14*	0.05	0.05	0.00	0.04	0.02	0.01	0.09	0.08	0.04
	(-0.18,0.04)	(0.04,0.24)	(-0.05,0.15)	(-0.05,0.15)	(-0.10,0.10)	(-0.07,0.15)	(-0.08,0.13)	(-0.09,0.12)	(-0.01,0.19)	(-0.02,0.19)	(-0.03,0.11)

¹Used as reference group.
²Increase in BMI z-score per 1°C.
³Adjusted for maternal education level, birth weight, indoor smoking, breastfeeding, maternal overweight before pregnancy.
*p < 0.05.

ISSN: 1471-2458