Table 1.

Descriptive Statistics of Sample.

Variable	Number	Per cent %	CCS	p Value	LCS	p Value
All samples	28577	100	9.46	—	5.77	—
Age
18~35	8120	28.41	8.15	—	3.20	—
36~55	12362	43.26	11.46	—	7.10	—
56~80	8095	28.33	8.06	<0.01	6.45	<0.01
BMI
Normal	20354	71.23	9.89	—	5.87	—
Over weight	6630	23.20	8.58	—	5.67	—
Obese	1593	5.57	7.68	<0.01	4.94	<0.01
Educational attainment
Primary or less	11019	38.56	10.07	—	6.60	—
Middle	14267	49.92	9.57	—	5.50	—
College	3291	11.52	4.18	<0.01	6.96	<0.01
Occupation types
Unemployed	6408	22.42	6.87	—	5.56	—
White collar	3933	13.76	8.93	—	5.09	—
Light physical	4536	15.87	9.72	—	5.73	—
Hard physical	13700	47.94	10.75	<0.01	6.08	<0.01
Region
East	9430	33.00	8.49	—	5.06	—
Middle	11894	41.62	9.96	—	6.04	—
West	7253	25.38	9.89	<0.01	6.26	<0.01
Drinking behaviour
Non-drinkers	12857	44.99	7.05	—	4.43	—
Barely	3106	10.87	9.31	—	5.20	—
Less frequently	4442	15.54	10.29	—	5.92	—
Frequently	8172	28.60	12.87	<0.01	8.03	<0.01
Diseases
Respiratory	621	2.17	8.38	0.02	7.14	<0.01
Hypertension	2069	7.24	7.05	<0.01	6.06	0.05
Myocardial Infarction	227	0.79	5.56	<0.01	5.28	0.40

The p Values came from F tests between subgroups.