Table 1.

Demographic variables and level of exposure to dust particles.

Variables	Sawmill (n = 100)	Control (n = 100)	p Value
Age(years)	33.73 ± 7.71	31.74 ± 8.40	0.082a
BMI	21.24 ± 2.10	21.89 ± 2.33	0.092a
Education			<0.001b
Illiterate (%)	71	28
Primary school (%)	15	12
High school (%)	10	21
Collage (%)	4	17
University (%)	0	22
Alcohol consumption (%)	15	9	0.192b
Family history of respiratory problems (%)	12	17	0.274b
Mask using (%)	13	23	0.066b
Inhalable dust particles (mg/m3)	1.61 ± 0.18	0.88 ± 0.10	<0.001a
Respirable dust particles (mg/m3)	1.27 ± 0.10	0.70 ± 0.11	<0.001a
TVOC (mg/m3)	0.42 ± 0.06	0.41 ± 0.07	0.428a

Note: Quantitative values are presented as mean ± standard deviation and qualitative values are presented as percentage.

Abbreviations: BMI, body mass index; TVOC, total volatile organic compounds.

^a t test.

^b χ ² test.