. Author manuscript; available in PMC: 2014 Aug 1.

Published in final edited form as: Indoor Air. 2013 Jan 31;23(4):285–294. doi: 10.1111/ina.12024

Table 4.

Log-linear regression model of household items visibly present to predict formaldehyde concentration. S = 0.2805 R² = 14.9% R² (adjusted) = 10.8% p-value = 0.017.

Predictor	Level (value)	Coefficient	Standard Error of Coefficient	p-value
*Intercept*	-	1.459	0.043	<0.001
*Ammonia-based cleaners used within the past week*	Yes (1)^*	0.183	0.097	0.064
	Unsure/Missing (2)^*	0.130	0.123	0.294
*Fiberglass, permanent press fabrics, or decorative laminates*	Yes (1)^*	0.198	0.082	0.019

versus No (0)