Table 4 Conditional Logistic Regression model for matched cases and controls, Multivariate Analysis, showing that regardless of PSI class = 5, having received pneumococcal vaccine, and age (in addition to all the variables by which the individuals were matched), the only two factors that increased the chance of having positive SPUAT were belonging to the CAP1 (OR 2.66) cohort and having positive blood cultures (OR 2.66)