Table 3. Adjusted ORs of hospital admissions and ER visits for those having a physician with a place as a USC, compared with those having a usual place only — 2012 KHP data.
| Parameters | Hospital admission | ER visit | |||||
|---|---|---|---|---|---|---|---|
| ORs | 95% CI | P value | ORs | 95% CI | P value | ||
| Age, yr | < 35 | 1.00 | - | - | 1.00 | - | - |
| 35–49 | 0.42 | 0.34–0.51 | < 0.001 | 0.55 | 0.43–0.71 | < 0.001 | |
| 50–64 | 0.43 | 0.34–0.55 | < 0.001 | 0.51 | 0.39–0.69 | < 0.001 | |
| ≥ 65 | 0.65 | 0.50–0.85 | 0.002 | 0.71 | 0.51–0.98 | 0.037 | |
| Sex | Male | 1.00 | - | - | 1.00 | - | - |
| Female | 0.92 | 0.81–1.04 | 0.165 | 0.84 | 0.72–0.97 | 0.016 | |
| Marital status | Married | 1.00 | - | - | 1.00 | - | - |
| Divorced or separated or widowed | 0.89 | 0.74–1.09 | 0.259 | 1.08 | 0.86–1.37 | 0.504 | |
| Unmarried | 0.32 | 0.26–0.41 | < 0.001 | 0.58 | 0.44–0.75 | < 0.001 | |
| Education, yr | ≤ 6 | 1.00 | - | - | 1.00 | - | - |
| 7–12 | 0.80 | 0.67–0.95 | 0.012 | 1.05 | 0.84–1.31 | 0.684 | |
| ≥ 13 | 0.70 | 0.56–0.87 | 0.002 | 0.79 | 0.60–1.04 | 0.088 | |
| Household income, quintile | First | 1.00 | - | - | 1.00 | - | - |
| Second | 0.92 | 0.74–1.14 | 0.440 | 1.14 | 0.88–1.47 | 0.313 | |
| Third | 1.06 | 0.85–1.31 | 0.617 | 1.11 | 0.85–1.44 | 0.463 | |
| Fourth | 1.01 | 0.81–1.27 | 0.913 | 1.10 | 0.84–1.44 | 0.488 | |
| Fifth (highest) | 1.16 | 0.93–1.45 | 0.200 | 1.04 | 0.79–1.38 | 0.770 | |
| Type of health insurance | Employee | 1.00 | - | - | 1.00 | - | - |
| Self-employed | 1.00 | 0.88–1.15 | 0.953 | 0.94 | 0.80–1.11 | 0.457 | |
| Medicaid | 1.39 | 1.05–1.85 | 0.021 | 1.31 | 0.94–1.83 | 0.111 | |
| Chronic disease | Not having | 1.00 | - | - | 1.00 | - | - |
| Having | 1.70 | 1.46–1.98 | < 0.001 | 1.43 | 1.19–1.70 | < 0.001 | |
| Subjective health | Good | 1.00 | - | - | 1.00 | - | - |
| Fair | 1.13 | 0.99–1.29 | 0.081 | 0.95 | 0.81–1.12 | 0.521 | |
| Poor | 2.20 | 1.86–2.60 | < 0.001 | 2.03 | 1.67–2.48 | < 0.001 | |
| Outpatient visit, frequency/year | < 5 | 1.00 | - | - | 1.00 | - | - |
| 5–10 | 1.00 | 0.84–1.19 | 0.993 | 0.93 | 0.76–1.15 | 0.513 | |
| 11–22 | 1.08 | 0.92–1.28 | 0.330 | 0.96 | 0.79–1.17 | 0.672 | |
| ≥ 23 | 1.02 | 0.87–1.21 | 0.787 | 1.04 | 0.86–1.26 | 0.686 | |
| Type of USC | Usual place only | 1.00 | - | - | 1.00 | - | - |
| Not having | 0.73 | 0.60–0.88 | 0.001 | 0.70 | 0.56–0.87 | 0.002 | |
| Physician with a place | 0.77 | 0.62–0.96 | 0.021 | 0.71 | 0.55–0.93 | 0.013 | |
| P value for the Hosmer-Lemeshow test of model fit | 0.791 | 0.136 | |||||
| Concordance statistic for discriminative ability | 0.690 | 0.641 | |||||
Multiple logistic regression analysis; sample cross-sectional weights were applied.
USC = usual source of care, ER = emergency room, KHP = Korea Health Panel, OR = odds ratio, CI = confidence interval.