 For differences in average lipid values between the 2 groups, with 180 evaluable patients, a 2-sided alpha level at 0.05 and with 80 power, we can detect statistical significance if the difference is: for Total Cholesterol19 mgdL SD of 46, for HDL-C 4.6 mgdL SD11, for TG 30 mgdL SD72, for LDL-C 15 SD36 and for ApoB 13 SD32. 