Table 2. Childhood risk factors and diseases of the study groups
	Asthma	COPD		ACO	p
Childhood Conditions/Exposures
Birthplace
Urban	86 (42.4%)	38 (32.2%)	26	(30.6%)	0.04
Rural	117 (57.6%)	80 (67.8%)	59	(69.4%)
Breastfeeding	195 (95.6%)	109 (92.4%)	81	(95.3%)	>0.05
Attendance to preschool	10 (4.9%)	3 (2.6%)	2	(2.4%)	>0.05
Pet at home	69 (34%)	58 (49.2%)	27	(31.8%)	0.011
Childhood exposure to ETS	135 (66.5%)	79 (66.9%)	59	(67.2%)	>0.05
Exposure to biomass	47 (23.2%)	38 (32.2%)	33	(38.8%)	0.019
Childhood Diseases
Childhood asthma	13 (6.4%)	0 (0)	7	(8.2%)	0.011
Childhood eczema	6 (2.9%)	1 (0.8%)		0 (0)	>0.05
Childhood food allergy	4 (2%)	0 (0)		0 (0)	>0.05
Childhood allergic rhinitis	27 (13.2%)	1 (0.8%)	3	(3.5%)	<0.001
Measles	57 (27.9%)	18 (15.3%)	16	(18.8%)	0.021
Tuberculosis	2 (1%)	6 (5.1%)	4	(4.7%)	>0.05
Pneumonia	15 (7.4%)	26 (22.2%)	11	(12.9%)	0.001