Demographic and clinical characteristics of patients who underwent total knee arthroplasty in the pre-pandemic and pandemic periods
| Characteristic | Period | p value | |
|---|---|---|---|
| April 2019 – February 2020 | April 2020 – February 2021 | ||
| Age, yr, mean ± SD | 68.3 ± 8.7 | 68.2 ± 8.7 | 0.27 |
| Sex, female, % | 61.4 | 60.6 | 0.11 |
| CCI, no. (%) | |||
| 0 | 22 525 (95.2) | 14 436 (95.9) | 0.001 |
| 1 | 1088 (4.6) | 617 (4.1) | 0.02 |
| 2 | 47 (0.2) | 1 (0.03) | < 0.001 |
CCI = Charlson Comorbidity Index; SD = standard deviation.