Fig. 2
From: In-hospital mortality after surgery: a retrospective cohort study in a Japanese university hospital
Age distribution of surgical patients who underwent surgical procedures between January 2010 and December 2011 at Kawasaki Medical School Hospital. The second or later surgery/anesthesia cases during one hospital stay were excluded. Among 8414 anesthesia/surgical cases, 7291 (86.7 %) cases were elective (white bars) and 1123 (13.3 %) cases were emergencies (black bars). The mean age was 52.0 ± 25.9 years with the largest age group in their 70 s. The percentage of patients aged ≥65 years was 41.0 %