TABLE 4—

Adjusted Prevalence of Respiratory Symptoms and Illness in Relation to the Joint Effect of Family History of Atopy and Home Renovation: 7 Northeastern Cities Study, 25 Districts in Northeast China, 2008–2009

Characteristics	No.	Cough, POR (95% CI)	Phlegm, POR (95% CI)	Doctor-Diagnosed Asthma, POR (95% CI)	Current Asthma, POR (95% CI)	Current Wheeze, POR (95% CI)
No family history of atopy and no home renovation (Ref)	17 595	1.00	1.00	1.00	1.00	1.00
No family history of atopy and home renovationa	8951	1.37 (1.25, 1.51)	1.65 (1.45, 1.88)	1.38 (1.23, 1.55)	1.40 (1.15, 1.71)	1.24 (1.10, 1.39)
Family history of atopy and no home renovationb	2889	1.81 (1.60, 2.04)	2.04 (1.73, 2.41)	2.73 (2.40, 3.12)	3.74 (3.03, 4.61)	2.74 (2.39, 3.13)
Family history of atopy and home renovationc	1614	2.33 (2.01, 2.70)	2.94 (2.42, 3.58)	3.52 (3.00, 4.11)	4.33 (3.39, 5.53)	3.44 (2.93, 4.03)
Family history of atopy and home renovation vs family history of atopy and no home renovation	1614	1.31 (1.10, 1.56)	1.55 (1.22, 1.96)	1.28 (1.06, 1.53)	1.18 (0.90, 1.54)	1.30 (1.08, 1.56)

Note. CI = confidence interval; POR = prevalence odds ratio. The sample size was n = 31 049. POR adjusted for age, gender, parental education, breast feeding, low birth weight, child’s obesity, area per person of urban Chinese homes, house close to main road, house close to a factory, house close to a smokestack, use of domestic cooking and heating fuels, ventilation device in kitchen, window use in winter, humidifier use in winter, keeping pets in the home, home mold, home pests, secondhand smoke exposure, and study districts.

^aHaving no family history of atopy but having home renovation in recent 2 y.

^bHaving family history of atopy but having no home renovation in recent 2 y.

^cPOR comparing families with atopy history and home renovation with families with atopy history and no home renovation, which evaluates the effect of home renovation among children with family history of atopy.