Table 1. Characteristics of 41,229 patients with asthma and 164,916 non-asthma controls enrolled.

	Total (n = 206,145)		Asthma (n = 41,229)		Non-asthma (n = 164,916)
	n	%	n	%	n	%	p-value
Male	94,430	45.81	18,886	45.81	75,544	45.81	1.000
Female	111,715	54.19	22,343	54.19	89,372	54.19
Age in 1997 (years old)
Mean (range)	49.56 (18–91.64)		49.56 (18–91.43)		49.56 (18–91.64)		0.967
STD	16.48		16.48		16.48
IQR	36.33–63.22		36.34–63.22		36.32–63.22