Table 1.
Patients’ characteristics
| All patients | Males | Females | |
|---|---|---|---|
| (n=101) | (n=37) | (n=64) | |
| Age (y) | 67±10 | 66±8 | 68±10 |
| Body weight (kg) | 81.1±16.9 | 86.3±11.0 | 78.1±18.9* |
| Height (m) | 1.69±0.09 | 1.75±0.07 | 1.65±0.08* |
| BMI ((kg•m-2) | 28.4±5.0 | 28.3±3.6 | 28.5±5.7 |
| Length of stay (d) | 6.1±1.8 | 6.1±1.8 | 6.1±1.9 |
| Resting Metabolic Rate (MJ•d-1) | 6.30±1.04 | 7.15±0.74 | 5.81±0.87* |
| General Anesthesia (n) | 68 (67%) | 25 (68%) | 43 (67%) |
| Spinal Anesthesia (n) | 33 (33%) | 12 (32%) | 21 (33%) |
| THA (n and %) | 57 (56%) | 18 (49%) | 39 (61%) |
| TKA (n and %) | 44 (44%) | 19 (51%) | 25 (39%) |
Values are mean±SD. BMI: body mass index, THA: total hip arthroplasty, TKA: total knee arthroplasty. Resting metabolic rate was calculated based upon gender, body weight, height and age, using the adjusted Harris and Benedict equation. Data were analyzed by a Students t-test. * Indicates a significant difference between males and females, P<0.05