Table 1. Participant characteristics (n = 300).

Characteristics	Description	Wood users N = 145	Other fuel users N = 155	P value
Age (years)	Median (IQR)	53 (47.5–59)	49 (44–53)	0.000
	40–49	45 (31%)	79 (51%)
	50–59	66 (45.5%)	63 (40.6%)
	60–69	26 (17.9%)	9 (5.8%)
	≧70	8 (5.5%)	4 (2.6%)
School education		115 (79.3%)	152 (98.1%)	0.000
Smoking status		1 (0.7%)	1 (0.6%)	0.62
Pet animals at home		43 (29.7%)	81 (52.3%)	0.000
Knowledge of harmful effects of wood smoke		25 (17.2%)	77 (49.7%)	0.000
Kitchen location	Indoor	0	18 (11.6%)
	Outdoor	145 (100%)	5 (3.2%)
	Both	0	132 (85.2%)
Cooking smoke exposure (years)	Median (IQR)	40 (40–45.5)	35 (30–40)	0.000
Cooking smoke exposure (hours)	Median (IQR)	2 (2–3)	2 (2–3)	0.31

IQR: Interquartile range.