Fig. 6
From: Healthcare exposures and associated risk of endocarditis after open-heart cardiac valve surgery
Hazard ratio for PVE after healthcare exposure according to duration considered to be at risk. Adjusted hazard ratios in multivariable Cox regression analysis using standard set of variables (as in Fig. 5). Reported hazard ratios are for healthcare exposures that occur beyond 3 months from index cardiac valve surgery. Vertical dotted line marks 90 days (the duration used in the present study). Shaded area indicates days 30–60