Table I.
Summary of patients.
| Variable | TKA cohort (2011 to 2018) n = 137,969 |
THA cohort (2011 to 2018) n = 78,532 |
|---|---|---|
| Mean age, yrs (SD) | 66.6 (9.6) | 64.7 (11.4) |
| Female sex, n (%) | 85,163 (61.7) | 42,637 (54.3) |
| Race, n (%) | ||
| White | 109,179 (79.1) | 64,370 (82.0) |
| Black | 10,939 (7.9) | 6,478 (8.3) |
| Other | 17,851 (12.9) | 7,684 (9.7) |
| Independent functional status | 136,484 (98.9) | 77,241 (98.4) |
| Mean BMI, kg/m2 (SD) | 33.2 (6.8) | 30.4 (6.3) |
| Smoker, n (%) | 11,766 (8.5) | 10,392 (13.2) |
| CHF, n (%) | 442 (0.3) | 259 (0.3) |
| COPD, n (%) | 5143 (3.7) | 3,181 (4.1) |
| Diabetes, n (%) | 25,660 (18.6) | 9,673 (12.3) |
| Dialysis, n (%) | 262 (0.2) | 157 (0.2) |
| Hypertension, n (%) | 91,673 (66.4) | 44,953 (57.2) |
| Steroid use, n (%) | 5,487 (4.0) | 3,152 (4.0) |
| Bleeding disorder, n (%) | 3,111 (2.3) | 1,620 (2.1) |
| Dyspnea, n (%) | 8,387 (6.1) | 3,730 (4.8) |
| ASA grade, n (%) | ||
| I/II | 67,731 (49.1) | 44,494 (56.7) |
| III/IV | 70,238 (50.9) | 34,038 (43.3) |
| Anaesthesia type, n (%) | ||
| General | 70,317 (51.0) | 43,515 (55.4) |
| Neuraxial | 67,652 (49.0) | 35,017 (44.6) |
| Mean operation length, mins (SD) | 92.4 (33.6) | 92.5 (38.4) |
| Mean length of stay, days (SD) | 2.6 (2.4) | 2.2 (1.4) |
| Discharge destination, n (%) | ||
| Home | 106,562 (77.2) | 63,529 (80.9) |
| Other | 31,407 (22.8) | 15,003 (19.1) |
ASA, American Society of Anesthesiologists; CHF, congestive heart failure; COPD, chronic obstructive pulmonary disease; SD, standard deviation; THA, total hip arthroplasty; TKA, total knee arthroplasty.