Table 5.

Multivariate logistic regression model for IFI and PCR (IFI: November 2008–2009; n = 255 and PCR: November 2008 to September 2009; n = 180)

Variable	OR	95% CI
IFI positive
Absolute humidity	0·72	0·59–0·86
Air conditioning	4·16	1·45–11·8
Mold in home	2·95	1·10–8·29
PCR positive
Air conditioning	2·27	1·04–4·97
Average temperature	0·92	0·86–0·98
Mean concentration of pollutants	1·04	1·00–1·08

OR, odds ratio; CI, confidence interval.