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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)

From: Decreased relative risk of pneumococcal pneumonia during the last decade, a nested case-control study

Variable OR CI 95% p value
CAP1 versus CAP2 Períod 1.23 0.30 to 2.17 0.01
Positive blood cultures 2.66 0.80 to 4.52 0.005
PSI = 5 0.005 −0.013 to 0.023 0.590
Decesed −0.19 −1.57 to 1.20 0.790
Pneumococcal vaccination 0.27 −1.2 to 1.73 0.720