Odds Ratios for the Association between Storage Time of Red Blood Cell Transfusions and Development of Healthcare-Associated <i>Clostridium difficile</i> Infection.

aOdds ratio per unit increase in RBC transfusion storage time, adjusted for volume of RBC given, surgical procedures, chemotherapy, dialysis, and number of doses of antibacterial, immunosuppressant, proton pump inhibitor, histamone-2 receptor antagonist, and statin medications. bConditional logistic regression model accounting for matched design, offset by days at risk. cRandom intercept multi-level mixed effects logit model with repeated transfusions nested within individual.