Multivariable analysis of the association between SARS-CoV-2 infections and muscle strain injury using Cox proportional hazards regression analysis (AIC=53.9)
| Indicator | HR | 95% CI | P value |
| BMI (kg/m2) | 2.0 | 1.2 to 3.1 | 0.004 |
| SARS-CoV-2 infection | 5.1 | 1.1 to 23.1 | 0.037 |
AIC, Akaike’s information criterion; BMI, body mass index.