The multivariate regression correlation test between age, BMI, and CD4/CD8 ratio on neutralizing antibodies (NAbs) titer was preceded by the Shapiro-Wilk normality test

Shapiro-Wilk testAgeBMI (kg/m2)Ratio CD4/CD8Vitamin DNAb
Mean47.0223.861.2914.4737.33
Standard deviation15.413.650.447.7326.83
Asymptotic significance0.0580.2000.1820.0340.068
PredictorRR squareP
Age, BMI, ratio CD4/CD80.4410.1950.033
Multiple correlation testCoefficientsP
Constant69.4620.029
Age0.2250.371
BMI–2.5770.018
Ratio CD4/CD814.5890.099