Table 3. Logistic regression analyses on visiting a physician for the most recent RTI using the Andersen's model (n = 344).
| Variables | Category | Crude OR (95% CI)* | AOR (95% CI)† |
|---|---|---|---|
| Predisposing factors | |||
| Socio-demographics | |||
| Age, yr | ≤ 24 | 0.54 (0.22–1.34) | 1.03 (0.28–3.26) |
| 25–39 | 1.02 (0.54–1.91) | 1.00 (0.44–1.92) | |
| 40–59 | 1.18 (0.71–1.94) | 1.24 (0.69–2.25) | |
| ≥ 60 | 1.00 | 1.00 | |
| Marital status | Married | 0.62 (0.37–1.04)‡ | 0.97 (0.47–1.97) |
| Others | 1.00 | 1.00 | |
| Occupation | Employed | 2.97 (1.13–7.79) | 2.75 (0.86–9.0.2)‡ |
| Unemployed/retired/houseman/wife | 2.77 (1.04–7.38) | 2.53 (0.73–8.03) | |
| Student/other | 1.00 | 1.00 | |
| Knowledge and attitude | |||
| Common colds are cured more quickly with antibiotics | Incorrect answer | 1.56 (0.99–2.48) | 1.43 (0.85–2.40) |
| Correct answer | 1.00 | 1.00 | |
| Antibiotics side effects | Not or a bit of a problem | 0.73 (0.48–1.13) | 0.73 (0.45–1.17) |
| Moderate or major problem | 1.00 | 1.00 | |
| Expect antibiotic if visit a physician for sore throat | Yes | 1.79 (1.00–3.20) | 2.20 (1.15–4.21)§ |
| No | 1.00 | 1.00 | |
| Enabling factors | |||
| Health insurance type | NHI | 1.39 (0.90–2.14) | 1.78 (1.06–2.90)§ |
| Private/Medicaid | 1.00 | 1.00 | |
| Need factors | |||
| Severity of symptoms | Severe | 8.48 (3.38–21.27) | 9.88 (3.66–25.75)‖ |
| Moderate | 3.39 (1.37–8.40) | 3.53 (1.32–8.87)§ | |
| Mild | 1.00 | 1.00 | |
| Hosmer and Lemeshow test | - | Non-significant (P = 0.745) | |
| Overall prediction, % | - | 69.3 | |
| Nagelkerke pseudo-R2 | - | 0.189 |
RTI = respiratory tract infection, OR = odds ratio, CI = confidence interval, AOR = adjusted odds ratio, NHI = National Health Insurance.
*This column shows ORs for those variables significant at P < 0.2 in crude models; †Adjusted for all significant variables from crude models simultaneously; ‡P < 0.1; §P < 0.05; ‖P < 0.001.