Table 1. Basic characteristics of women.

Women	Category	Distribution (%)	No admission for LRTIs		Admission for LRTIs		pvalue
			n	(%)	n	(%)
Age	18–24	169 (17.2)	99	58.6	70	41.4	0.717
	25–39	742 (75.5)	456	61.5	286	38.5
	≧40	72 (7.3)	42	58.3	30	41.7
	Missing (%)		36 (3.5)
Educational level	No education	13 (1.3)	7	53.9	6	46.2	0.852
	Primary	78 (7.9)	49	62.8	29	37.2
	Secondary	661 (66.8)	407	61.6	254	38.4
	Tertiary	238 (24.0)	141	59.2	97	40.8
	Missing (%)		29 (2.8)
Wealth index	Poorest	199 (20.4)	127	63.8	72	36.2	0.644
	Poor	194 (19.7)	120	61.9	74	38.1
	Middle	196 (19.9)	123	62.8	73	37.2
	Wealthy	197 (20.0)	112	56.9	85	43.2
	Wealthiest	197 (20.0)	118	59.9	79	40.1
	Missing (%)		36 (3.5)
Family crowding	≦4	597 (60.2)	359	60.1	238	39.9	0.498
	≧5	395 (39.8)	246	62.3	149	37.7
	Missing (%)		27 (2.6)
Nomadic status	Nomadic	448 (45.2)	286	63.8	162	36.2	0.247
	Sedentary	487 (49.2)	285	58.5	202	41.5
	Seasonal	55 (5.6)	33	60.0	22	40
	Missing (%)		29 (2.8)
Use of stove	Yes	947 (95.4)	585	61.8	362	38.2	0.029
	No	46 (4.6)	21	45.7	25	54.4
	Missing (%)		26 (2.5)
Smoking place	No smoking	501(50.8)	324	64.7	177	35.3	0.051
	Inside the home	330 (33.4)	186	56.4	144	43.6
	Outside	156 (15.8)	93	59.6	63	40.4
	Missing (%)		26 (2.5)
Number of cigarettes smoked per day	0	506 (50.9)	327	64.6	179	35.4	0.055
	1~10	340 (34.2)	197	57.9	143	42.1
	≧11	147 (14.9)	82	55.8	65	44.2
	Missing (%)		26 (2.5)
Healthcare-seeking behaviour	Formal	742 (79.4)	432	58.2	310	41.8	0.002
	Informal	122 (13.1)	76	62.3	46	37.7
	None	70 (7.5)	56	80.0	14	20.0
	Missing (%)		85 (8.3)