Fig. 13From: Assessment of estimated low-density lipoprotein-cholesterol (LDL-c) equations: a systematic review and meta-analysisThe correlation coefficients of Friedewald’s and the Sampson’s LDL-c equations with direct measurement in determining levels of LDL-c from 3 matching studies. Though both equations had a positive correlation with the direct method of measuring LDL-c, the Sampson’s LDL-c equation showed a stronger positive correlation with the direct method [0.95 (95% CI 0.89–0.98)] as compared with the Friedewald’s equation [0.92 (95% CI 0.92–0.92)]Back to article page