TABLE 2.

Concordance of directly measured LDL‐cholesterol with estimated cholesterol using Friedewald equation, Martin/Hopkins equation, Extended Martin/Hopkins equation, Sampson equation according to TG levels.

DLDL, mg/dL	TG < 200 mg/dL					TG 200–799 mg/dL
	n	FLDL	EMLDL	SLDL	p value a	n	FLDL	EMLDL	SLDL	p value a
<40	26	100.0	100.0	100.0	1.000	6	100.0	100.0	100.0	1.000
40–69	646	84.8	87.3	85.5	<0.001 b	38	84.2	84.2	84.2	1.000
70–99	1947	76.7	78.0	76.6	0.028 c	148	43.9	73.0	66.9	<0.001 f
100–129	2319	75.7	77.7	76.4	0.001 d	204	55.4	73.5	69.6	<0.001 f
130–159	1979	74.7	75.3	76.2	0.093	225	48.0	70.7	60.9	<0.001 g
160–189	784	71.8	72.5	74.7	0.009 e	81	51.9	60.5	58.0	0.005 c
≥190	249	75.9	69.1	79.9	<0.001 b	24	54.2	66.7	58.3	0.097

Note: Values shown are n/N in group (%).

Abbreviations: DLDL, directly measured LDL‐cholesterol; EMLDL, LDL‐cholesterol estimated using extended Martin/Hopkins equation; FLDL, LDL‐cholesterol estimated using Friedewald equation; SLDL, LDL‐cholesterol estimated using Sampson equation; TG, triglyceride.

^a p values were calculated with Cochran's Q test.

^b FLDL versus EMLDL; EMLDL versus SLDL <0.05.

^c EMLDL versus SLDL <0.05.

^d FLDL versus EMLDL <0.05.

^e FLDL versus SLDL <0.05.

^f FLDL versus EMLDL; FLDL versus SLDL <0.05.

^g FLDL versus EMLDL; FLDL versus SLDL; EMLDL versus SLDL <0.05.