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. 2022 Mar 4;13:839922. doi: 10.3389/fimmu.2022.839922

Table 3.

Linear regression for Anti-SARS-CoV-2 antibody ratio as dependent variable and smoking, age and BMI as covariable.

Variable Parameter Estimate p-value 95% CI
(Intercept) α 1.249 <0.001 (1.168, 1.329)
BMI -25* β1 -0.0182 0.01 (-0.032, -0.0043)
Current smoking (yes) β2 -0.128 0.08 (-0.273, 0.017)
Age -50* β3 -0.0115 <0.001 (-0.0175, -0.00544)

CI, confidence interval; BMI, body mass index.

R2 = 0.13

*linear transformation of BMI (minus 25) and Age (minus 50).