Table 4.

Predictors of adults andchildren respiratory system symptoms, as identified by Multivariate Logistic Regression analysis

	Variable	B	S.E.	Wald	d f	Sig	OR	95% C.I. for OR
Adults	Formaldehyde	0.957	0.197	23.644	1	0.000	2.603	1.770–3.828
	concentration
	Ventilation	0.472	0.171	7.605	1	0.006	1.604	1.146–2.244
	frequency
	Domestic pets	0.387	0.207	3.485	1	0.062	1.472	0.981–2.210
	Constant	−2.792	0.154	329.260	1	0.000	0.061
Children	Formaldehyde	1.447	0.369	15.410	1	0.000	4.250	2.064–8.753
	concentration
	Family history	0.653	0.334	3.831	1	0.050	1.922	0.999–3.697
	of allergy
	Ventilation	0.605	0.306	3.916	1	0.048	1.831	1.006–3.333
	frequency
	Constant	−1.567	0.441	12.642	1	0.000	0.209

Note. B: partial regression coefficient; S.E.: standard error; Wald: Wald Test; df: degrees of freedom; Sig: P value; OR: odds ratio; C.I.: confidence interval