Table 1.
Characteristics of eligible TKA recipients.
| Number of patients | N = 92,343 |
|---|---|
| Demographics | |
| Age (y) [Median (IQR)] | 68 (61–75) |
| Female [N (%)] | 56,807 (61.5%) |
| Rural residence [N (%)] | 15,451 (16.7%) |
| Income quintile [N (%)] | |
| Lowest | 15,839 (17.2%) |
| 2 | 19,151 (20.7%) |
| 3 | 18,944 (20.5%) |
| 4 | 19,018 (20.6%) |
| Highest | 19,173 (20.8%) |
| Co-morbidities [N (%)] | |
| Coronary artery disease | 2959 (3.2%) |
| Congestive heart failure | 4781 (5.2%) |
| Chronic obstructive pulmonary disease | 17,280 (18.7%) |
| Counseled about smoking cessation | 3879 (4.2%) |
| Diabetes | 27,095 (29.3%) |
| Hypertension | 67,833 (73.5%) |
| Frail | 5483 (5.9%) |
| BMI > 40 | 1500 (1.6%) |
| Charlson score [N (%)] | |
| 0 | 65,628 (71.1%) |
| 1 | 16,901 (18.3%) |
| 2 | 6345 (6.9%) |
| 3 or more | 3469 (3.8%) |
| Admission characteristics | |
| Hospital volume [Median (IQR)] | 411 (301–589) |
| Surgeon volume [Median (IQR)] | 99 (69–135) |
| General anesthetic [N (%)] | 15,921 (17.2%) |
| Duration of surgery [Median (IQR)] | 106 (91–124) |