Description of Study Population (N = 47,433)
| Characteristics | Value |
|---|---|
| Age, years | |
| Mean (SD) | 54.2 (12.5) |
| Median (range) | 54 (20–100) |
| Sex, No. (%) | |
| Male | 24,060 (50.7) |
| Female | 23,373 (49.3) |
| Premium in Korean wona | |
| Mean (SD) | 45,567 (37,077) |
| Income level, No. (%) | |
| 1st quartile; low | 12,062 (25.4) |
| 2nd quartile | 11,692 (24.6) |
| 3rd quartile | 12,360 (26.1) |
| 4th quartile; high | 11,319 (23.9) |
| Place of residence, No. (%) | |
| Metropolitan area | 24,742 (52.8) |
| City area | 16,830 (35.9) |
| Rural area | 5,327 (11.4) |
| Charlson comorbidity score | |
| Mean (SD) | 0.49 (0.81) |
| Median (range) | 0 (0–11) |
| Number of visits, mean (SD) | |
| During the first 2 years | 14.4 (7.9) |
| During the second 2 years | 14.2 (10.9) |
| During the third 2 years | 15.7 (14.7) |
| Continuity of care indices, median (interquartile range) | |
| Most frequent provider continuity (MFPC) | 0.88 (0.67–1.00) |
| Modified, modified continuity index (MMCI) | 0.93 (0.84–1.00) |
| Continuity of care index (COC) | 0.77 (0.49–1.00) |
↵a $1 (US) = ₩1,100 (Korean won), as of 2012.