Table 1.
Demographic distributions of the primary total hip and knee arthroplasty populations
| Joint demographics | Hip | Knee | Significance |
|---|---|---|---|
| Age (mean), 95% CI (upper, lower) | 68.13 (67.54, 68.72) | 69.73 (69.31, 70.15) | < 0.0001 |
| Body mass index (mean), 95% CI (upper, lower) | 28.69 (28.40, 28.99) | 31.46 (31.17, 37.75) | < 0.0001 |
| Female (%) | 58% | 61% | 0.063 |
| Osteoarthritis (%) | 87% | 92% | < 0.0001* |
| Working (%) | 29% | 21% | 0.003 |
| Live alone (%) | 21% | 20% | 0.472 |
| ASA 3/4 (%) | 39% | 39% | 0.851 |
* Although significant, the relationship is very weak with a Cramer’s v value of 0.071; significance was found at the level 0.05; 95% CI = 95% confidence interval; ASA = American Society of Anesthesiologists.