. 2016 Feb 26;5(3):752–760. doi: 10.1039/c5tx00478k

Table 1. Mean levels of formaldehyde (μg m^–3) measured in the personal dosimeters of the workers of a plastic laminate plant and the controls.

Indoor formaldehyde exposure levels
	N	Mean levels ± SE	P-value ^a
Age
<42 years ^b	31	171.9 ± 24
42–49 years	35	130.5 ± 19	<0.001
>49 years	29	77.8 ± 16	<0.001
P-value for trend			0.001
Tobacco smoking
Non-smokers ^b	57	120.1 ± 16
Smokers	38	139.7 ± 18	0.676
Jobs
Controls ^b	45	35.2 ± 3.4
Plastic laminate plant workers	50	211.4 ± 14.8	<0.001

^a P-values after adjusting for confounding factors.

^bReference level.

Table 1. Mean levels of formaldehyde (μg m–3) measured in the personal dosimeters of the workers of a plastic laminate plant and the controls.