Table 1.
Patient demographics and surgical variables
| Mean ± SD (Range) or No. (%) | |
|---|---|
| Age, y | 65 ± 7.8 (49–87) |
| BMI, kg/m2 | 30.5 ± 6.1 (19–50) |
| Female | 73/126 (58) |
| Race | |
| Non-Hispanic white | 114 (91) |
| African American | 6 (4.5) |
| Asian | 2 (1.5) |
| Other/not available | 4 (3) |
| ASA class | |
| 1 | 2(1.5) |
| 2 | 82(65) |
| 3 | 42 (33.5) |
| Taking opioids prior to TKA | 6 (4.5) |
| Anesthesia type | |
| Neuraxial | 94 (74.6) |
| General | 29 (23) |
| Neuraxial converted to general | 3 (2.4) |
ASA = american society of anesthesiologists; BMI = body mass index; TKA = total knee arthroplasty.