Table 1. Characteristics of the subjects.

Characteristics	n*	%†	%SE
Total stroke patients
Yes	4,604	1.4	0.0
No	224,532	98.6	0.0
Sex
Male	2,308	51.6	0.6
Female	2,296	48.4	0.6
Age (years)
19–64	1,282	35.5	0.6
65–74	1,950	38.1	0.6
≥75	1,372	26.4	0.5
Educational level
Elementary school or less	3,009	55.6	0.6
Middle school	581	14.8	0.4
High school and over	1,003	29.7	0.6
Monthly household income (10,000 won)
≤100	2,461	48.4	0.6
101–200	815	22.6	0.6
201–300	427	12.6	0.5
301–400	83	2.3	0.2
≥401	386	14.0	0.5
Occupation
Yes	1,072	21.3	0.5
No	3,201	78.7	0.5
Residential area
Urban	1,983	72.3	0.2
Rural	2,621	27.7	0.2
Living with family
Yes	3,893	87.1	0.4
No (alone)	711	12.9	0.4

* n: sample size, ^†%: estimated percent of the population