Table 3.
Hospitalizations, Patients, Time at Risk, and Falls According to Knee Categorya
| Knee Category | ||||||
|---|---|---|---|---|---|---|
| LK | AMK | FK | MPK | NA | All | |
| Hospitalizations (%) | 251 (16.9%) | 113 (7.6%) | 498 (33.5%) | 583 (39.2%) | 41 (2.8%) | 1486 |
| Patients | 189 | 83 | 334 | 260 | 30 | 815 |
| Hospitalization days | 6760 | 2332 | 11,889 | 10,453 | 779 | 32,213 |
| Falls with prosthesis | 6 | 5 | 41 | 14 | 2 | 68 |
| IR (95% CI) for falls with prosthesis per 1000 patient days – unadjusted | 0.87 (0.25 to 2.22) |
2.13 (0.38 to 4.86) |
3.51 (1.83 to 5.71) |
1.19 (0.50 to 2.49) |
2.08 (1.19 to 3.30) |
|
| IR (95% CI) for falls with prosthesis per 1000 patient days – PS-weighted | 1.07 (0.43 to 2.67) |
1.63 (0.48 to 5.52) |
2.81 (1.96 to 4.02) |
1.15 (0.62 to 2.12) |
||
a AMK = articulating mechanical knee; FK = fluid-controlled knee; IR = incidence rate; LK = locked knee; MPK = microprocessor-controlled knee; NA = not available; PS = propensity score.