INS and diabetes mellitus: Patients in the eldest age quartile (4th group) demonstrated a higher prevalence of diabetes, 23% (n=58) of whom were insulin dependent and 29% insulin independent (n=73) (p<0.001), higher ASA class status (p<0.001), lower height (p<0.001), lower max weight (p<0.001), lower max BMI (p<0.001), and lower BMI on day of surgery (p<0.001).