highly significantp < 0.0001
In the overall population, a medium but highly significant correlation (r = −0.31, p < 0.0001) was found between age and the log-transformed values of antibody titres.
In the overall population, a medium but highly significant correlation (r = −0.31, p < 0.0001) was found between age and the log-transformed values of antibody titres.
In the univariate regression analysis, the relationship between age and Ab titres was borderline significant (beta = −0.03, p = 0.06), explaining only a very small part of h heterogeneity (r 2 = 0.03).
In the COVID-19-naive patients, when age was categorised in three groups (<60 years, 60–69 years and ≥70 years), no statistical difference was observed ( p = 0.018) but the evidence for a decreasing trend in Ab titres related to an increase in age was borderline significant ( p = 0.07) ( Figure 1 D–F) ( Table S5 ).
Similar to our findings in patients with NSCLC, other studies also showed a trend in a waning antibody response after booster vaccination in elderly healthy vaccines [ 7 , 9 , 14 ].