Table 2 Mean values of various methods LDL-C and correlation with direct LDL-C
LDL-C | Formula | Mean ± SD mg/dl (mmol/l) | Mean difference mg/dl (mmol/l) | Correlation (r) | p value |
|---|---|---|---|---|---|
Direct LDL-C | Directly measured | 93.61 ± 29.33 (2.42 ± 0.76) | NA | 1 | < 0.001 |
Friedewald | LDL-C(mg/dl) = TC - HDL-C - TG/5 | 93.95 ± 35.55 (2.43 ± 0.92) | 0.34 (0.01) | 0.896 | < 0.001 |
Sampson | LDL-C(mg/dl) = TC/0.948 - HDL-C/0.971 - (TG/8.56 + TG × Non-HDL-C/2140 - TG2/16,100) − 9.44 | 97.14 ± 34.27 (2.51 ± 0.89) | 3.53 (0.09) | 0.943 | < 0.001 |