If researchers are mostly interested in the association between BMIand number of days from symptom onset to admission, why is the effect of agebeing examined (provide details relevant to your data)?

Collinearity Statistics VIF Tolerance Days admiss death 1.00 0.999 Age 1.04 0.961 BMI 1.04 0.960 Model Fit Measures Overall Model Test Model R R2 Adjusted R2 F df1 df2 p 0.0808 0.00653 0.00513 4.67 3 2129 0.003 Model Coefficients - Days_sympt admiss 95% Confidence Interval Predictor Estimate SE Lower Upper p Intercept 3.17289 0.53823 2. 1174 4.22840 5.895 <.001 days_admiss_death age bmi>