Table 2.

Demographics and lung function according to the extent of biomass exposure

Variables	Mean±SD	Mean±SD	Mean±SD	p-value*
n=458	n=371	n=60	n=27
Biomass exposure in hours/years	1–99.99	100–199.99	200–600
Demographic data
Age, years	50±11	60±12	60±11	0.000
Weight, kg	68±13	66±14	68±15	0.720
Height, cm	149±7	148±5	146±6	0.018
Abdominal circumference, cm	96±11	97±12	100±12	0.169
Lung function
FEV1, L	2.44±0.49	2.09±0.50	1.86±0.50	0.000
FEV1, % pred	106±16	103±18	95±17	0.004
FVC, L	2.95±0.55	2.57±0.52	2.34±0.55	0.000
FVC, % pred	102±15	98±14	93±15	0.004
FEV1/FVC	83±5	80±8	79±6	0.001
FEV1/FEV6	0.84±0.04	0.83±0.03	0.81±0.05	0.000
SaO2%	93.4±3.61	92.81±2.9	91.9±2.2	0.046

Note:

^*One-way ANOVA.

Abbreviations: ANOVA, analysis of variance; FEV₁, forced expiratory volume in the first second; FEV₆, forced expiratory volume in the sixth second; FVC, forced vital capacity; % pred, percentage predicted; SaO₂, oxygen saturation.