General characteristics of the clinics
| Variables | N/mean | Per cent/SD |
|---|---|---|
| Region | ||
| Group A | 656 | 23.1 |
| Group B | 797 | 28.1 |
| Group C | 1223 | 43.1 |
| Group D | 161 | 5.7 |
| Major treatment area | ||
| Internal medicine | 2315 | 81.6 |
| Family medicine | 522 | 18.4 |
| Grade: antibiotic prescription rate | ||
| 1 | 1377 | 48.5 |
| 2 | 374 | 13.2 |
| 3 | 375 | 13.2 |
| 4 | 363 | 12.8 |
| 5 | 348 | 12.3 |
| Grade: injectable drug prescription rate | ||
| 1 | 213 | 7.5 |
| 2 | 642 | 22.6 |
| 3 | 828 | 29.2 |
| 4 | 745 | 26.3 |
| 5 | 409 | 14.4 |
| Grade: kinds of prescribed drugs | ||
| 1 | 298 | 10.5 |
| 2 | 471 | 16.6 |
| 3 | 821 | 28.9 |
| 4 | 687 | 24.2 |
| 5 | 560 | 19.7 |
| Age of GP (years) | ||
| ≤39 | 80 | 2.8 |
| 40 to 49 | 1241 | 43.7 |
| 50 to 59 | 1130 | 39.8 |
| 60 to 69 | 315 | 11.1 |
| ≥70 | 71 | 2.5 |
| Months in operation | ||
| ≤5 | 427 | 15.1 |
| 6 to 10 | 639 | 22.5 |
| 11 to 15 | 890 | 31.4 |
| 16 to 20 | 414 | 14.6 |
| ≥21 | 467 | 16.5 |
| Number of nurses | ||
| 0 | 2081 | 73.4 |
| 1 | 482 | 17.0 |
| 2 to 5 | 234 | 8.3 |
| ≥6 | 40 | 1.4 |
| Outpatient volume (per month) | ||
| ≤999 | 338 | 11.9 |
| 1000 to 1999 | 1366 | 48.2 |
| ≥2000 | 1133 | 39.9 |
| Total outpatient billings (KRW10 000 per month) | ||
| ≤1.999 | 724 | 25.5 |
| 2.000 to 2.999 | 927 | 32.7 |
| ≥3.000 | 1186 | 41.8 |
| Percentage of female outpatients | 57.0 | ±5.6 |
| Percentage of elderly outpatients | 36.9 | ±15.8 |
| Total | 2837 | 100.0 |
GP, general practitioner.