Fig. 2.

Low cholesterol patients are more likely to require higher doses of opioids. a-b Patients were classified into three groups, low, medium and high cholesterol groups, depending on serum total cholesterol levels. The average of serum total cholesterol levels and patients number were listed below x-axis. There were significant differences between high and low cholesterol groups in both female (a) and male (b). (c-f) The final doses of morphine and fentanyl used for patients were converted into oxycodone doses, and were plotted with serum cholesterol level (c-d) and age (e-f). Data for female and male were plotted in (c & e) and (d & f)