. 2020 Mar 9;37(1):81–85. doi: 10.5114/ada.2019.85288

Table 4.

Correlation between diagnosed moderate asthma and the presence of central heating in the building

Central heating in the building	Moderate asthma diagnosed		The odds ratio (OR)	95% confidence interval (CI) for OR		P-value of χ² test
Central heating in the building	No	Yes	The odds ratio (OR)	95% confidence interval (CI) for OR		P-value of χ² test
No	487	17
Yes	4227	52	0.3524	0.2021	0.6142	0.0001