Figure 2.

(A, B, C and D) Cholesterol levels. Mean cholesterol levels per treatment group (OBS vs PTX). OBS, observation without intervention; PTX, parathyroidectomy. Error bars: ± 1 s.e.; *significant change within group from 0 to 5 years. (A) Mean Total-C decreased in OBS (P = 0.037), but not in PTX. There was a difference between groups over time (P = 0.013 for interaction between groups). (B) Mean HDL-C increased in both groups (OBS and PTX), (P < 0.01), without significant difference between the groups. (C) Mean LDL-C decreased in OBS (P = 0.010), but not in PTX. There was a difference between groups over time (P = 0.026 for interaction between groups). (D) Mean LDL-C in patients not started with statins in study period. The decrease in the OBS group was not significant (P = 0.079), and there was no difference between groups (P = 0.12).