Fig. 3. Kaplan-Meier curve showing the cumulative event-free proportion (death did not occur) during the first 10 postoperative days. The  dotted line represents patients who were not prescribed a β-blocker on the day of surgery (cumulative event rate 0.7%). The  solid line represents those patients who were prescribed a β-blocker on the day of surgery and in whom this prescription was continued for at least 1 week or until hospital discharge, whichever came first (cumulative event rate 0.9%). The  dashed - dotted line represents those who were prescribed a β-blocker on the day of surgery and in whom this prescription was discontinued during the first week after surgery (cumulative event rate 7.5%).