Table 1.

Baseline characteristics (n=116 677)

	ARB-only group N(%) or mean±SD	CCB-only group N(%) or mean±SD	MPC group N(%) or mean±SD	SPC group N(%) or mean±SD	P value
Total	29 400 (25.2%)	58 401 (50.0%)	10 458 (9.0%)	18 418 (15.8%)
Male (47.3%, n=55 210)	13 834	25 499	5507	10 370	<0.01
Female (52.7%, n=61 467)	15 566	32 902	4951	8048
Age (years)	59.3±12.5	62.4±12.2	61.1±12.4	56.9±12.3	<0.01
20–29 (0.6%)	263	204	48	148
30–39 (4.2%)	1426	1695	417	1362
40–49 (16.6%)	5455	8003	1653	4283
50–59 (26.4%)	8259	14 621	2681	5212
60–69 (27.7%)	7761	17 177	2944	4475
70–79 (19.0%)	4997	12 604	2138	2412
≥80 (5.5%)	1239	4097	577	526
Income					<0.01
Low (33.8%)	9396	20 277	3646	6063
Middle (25.6%)	7304	15 081	2647	4868
High (40.6%)	12 700	23 043	4165	7487
Residence					<0.01
Metropolitan (46.1%)	13 711	26 482	4771	8874
City (44.1%)	12 878	25 946	4670	7913
Rural (9.8%)	2811	5973	1017	1631
Health insurance					<0.01
National health insurance (94.2%)	27 679	55 113	9662	17 406
Medical aid (5.8%)	1721	3288	796	1012
Average no. of diagnoses	3.6±1.9	3.1±1.8	3.6±1.9	3.1±1.7	<0.01
Average no. of medications	4.1±2.2	3.9±2.0	4.9±2.1	3.7±2.0	<0.01
Average cost of antihypertension drug (₩)	651±185	413±141	982±316	824±196	<0.01
Prescription period (days)	1,174±575	1,477±603	1,164±560	972±412	<0.01
Total days supplied (days)	954±562	1,218±629	1,000±545	855±407	<0.01
Medication possession ratio (MPR)	81.0±23.9	80.9±23.2	85.3±19.6	87.7±17.7	<0.01

ARB, angiotensin II receptor blockers; CCB, calcium channel blockers; MPC, multiple-pill combination; SPC, single-pill combination.