Table 2.

Demographics and health characteristics of non-CC controls and CC patients in South Korea and Taiwan.

		South Korea					Taiwan
		Non-CC (N = 12,559)		CC patients (N = 101)		Non-CC vs. CC P-value	Non-CC (N = 11,248)		CC patients (N = 259)		Non-CC vs. CC P-value
		Mean ± SD		Mean ± SD			Mean ± SD		Mean ± SD
Age		45.21 ± 14.31		43.93 ± 13.99		0.372	44.71 ± 14.38		48.69 ± 14.35		<0.001
Charlson Comorbidity index		0.17 ± 0.49		0.42 ± 0.86		<0.001	0.25 ± 0.62		0.52 ± 0.77		<0.001
Adapted Charlson Comorbidity index		0.16 ± 0.47		0.31 ± 0.78		0.002	0.23 ± 0.61		0.39 ± 0.70		<0.001
		%	Count	%	Count	P-value	%	Count	%	Count	P-value
Gender	Male	49.9%	6268	44.6%	45	0.284	48.0%	5398	54.8%	142	0.030
	Female	50.1%	6291	55.4%	56		52.0%	5850	45.2%	117
Currently employed	No	30.5%	3828	25.7%	26	0.303	24.4%	2740	24.3%	63	0.989
	Yes	69.5%	8731	74.3%	75		75.6%	8508	75.7%	196
Level of education	University degree	61.4%	7708	62.4%	63	0.837	61.2%	6887	58.3%	151	0.339
	Not/Decline to answer	38.6%	4851	37.6%	38		38.8%	4361	41.7%	108
BMI category	Underweight (BMI<18.5)	6.6%	833	5.9%	6	0.675	6.8%	766	3.1%	8	0.025
	Normal weight (18.5 ≤ BMI<23)	42.5%	5342	49.5%	50		38.6%	4347	37.1%	96
	Overweight (23 ≤ BMI<25)	21.1%	2655	16.8%	17		19.0%	2139	22.0%	57
	Obese (BMI≥25)	24.8%	3109	23.8%	24		30.5%	3430	35.1%	91
	Decline to answer	4.9%	620	4.0%	4		5.0%	566	2.7%	7
Smoking status	Never	60.6%	7615	53.5%	54	0.093	81.0%	9114	69.9%	181	<0.001
	Former	16.8%	2109	14.9%	15		10.0%	1124	13.1%	34
	Current	22.6%	2835	31.7%	32		9.0%	1010	17.0%	44
Use of alcohol	Abstain	28.5%	3576	27.7%	28	0.868	55.5%	6246	50.6%	131	0.113
	Currently consume alcohol	71.5%	8983	72.3%	73		44.5%	5002	49.4%	128
Vigorous exercise in past 30 days	No	33.4%	4198	42.6%	43	0.052	36.5%	4102	37.1%	96	0.844
	Yes	66.6%	8361	57.4%	58		63.5%	7146	62.9%	163

CC, chronic cough; SD, standard deviation