Fig. 2: Exponentiated coefficients of linear regression models of log anti-S RBD antibody concentration.

Exponentiated coefficients of the linear regression model of log anti-S RBD antibody concentration in participants who received a BNT162b2 vaccine. b ChAdOx1 nCoV-19 vaccine. c either the BNT162b2 or ChAdOx1 nCoV-19 vaccine. The resultant values represent the fold change of antibody concentration associated with each variable (black square). The horizontal solid line through each square represents the 95% confidence interval. Each vaccine was modelled separately, and then a further model was created using all available data. The vertical dotted line represents a fold change of 1. Tests were two-tailed. p values were derived from linear regression using the t-test statistic and reported without correction for multiple testing. Source data are provided as a Source Data file. UC ulcerative colitis, IBDU IBD unclassified.