Association between emergency department visits following knee or hip replacement surgery and perfect continuity of primary care (1 primary care provider)
| Variable | Probability of an ED visit within 90 d of surgery | |||
|---|---|---|---|---|
| Knee replacement surgery | Hip replacement surgery | |||
| Unadjusted OR (95% CI) | Adjusted OR (95% CI) | Unadjusted OR (95% CI) | Adjusted OR (95% CI) | |
| MMCI = 1 (1 primary care provider) | 0.615* (0.542–697) | 0.819* (0.720–0.933) | 0.655* (0.563–0.761) | 0.827* (0.708–0.966) |
| Length of stay, d | – | 1.020* (1.012–1.027) | – | 1.002 (0.998–1.007) |
| Year of surgery | – | 1.027* (1.019–1.036) | – | 1.020* (1.009–1.032) |
| Hospital | ||||
| C | Ref. | Ref. | ||
| A | – | 1.064 (0.953–1.187) | – | 1.002 (0.868–1.156) |
| B | – | 0.660* (0.592–0.737) | – | 0.833* (0.724–0.958) |
| D | – | 1.001 (0.898–1.116) | – | 0.965 (0.815–1.143) |
| E | – | 0.919* (0.831–1.016) | – | 0.787* (0.683–0.907) |
| Age, yr | ||||
| 60–69 | Ref. | Ref. | ||
| < 50 | – | 1.408* (1.143–1.735) | – | 0.981 (0.802–1.201) |
| 50–59 | – | 1.048 (0.950–1.157) | – | 0.902 (0.785–1.036) |
| 70–84 | – | 1.089* (1.006–1.179) | – | 1.196* (1.072–1.336) |
| ≥ 85 | – | 1.423* (1.152–1.758) | – | 1.294* (1.023–1.638) |
| Female | – | 0.946* (0.882–1.015) | – | 0.873* (0.795–0.959) |
| Charlson Comorbidity Index score | – | 1.072* (1.026–1.121) | – | 1.066* (1.016–1.118) |
| Hypertension | – | 1.009 (0.941–1.083) | – | 1.000 (0.908–1.100) |
| Anemia | – | 1.122* (1.021–1.232) | – | 1.146 (1.012–1.299) |
| Median neighbourhood income | – | 1.002* (1.000–1.004) | – | 1.000 (0.998–1.002) |
| Blood transfusion | – | 1.265* (1.079–1.483) | – | 1.263* (1.073–1.486) |
| Admitted from home | – | 0.763 (0.543–1.072) | – | 0.877 (0.633–1.214) |
| Distance to hospital | – | 0.998* (0.998–0.999) | – | 0.999* (0.998–1.000) |
| ED visit 1 year earlier | – | 2.454* (2.280–2.641) | – | 2.015* (1.822–2.2.283) |
Note: For the analyses in this table, MMCI = 1. CI = confidence interval; ED = emergency department; MMCI = Modified Modified Continuity Index; OR = odds ratio; Ref. = reference category.
↵* Statistically significant value.