Table 2.

Comparison of lipoprotein subclasses among men aged 40–49 between whites in Allegheny County, Pennsylvania, U.S. and the Japanese in Kusatsu, Shiga, Japan in 2002–2005

	Whites (n = 215)	Japanese (n = 241)	P
Lipoprotein particle concentration
VLDL particles (nmol/L)
Total	91.7 ± 43.5	91.8 ± 45.2	0.80
Large	1.46 (0.59, 6.22)	0.50 (0.10, 2.75)	<0.01
Medium	34.1 (17.5, 55.5)	40.3 (18.7, 58.8)	0.14
Small	46.3 ± 21.3	44.0 ± 24.7	0.28
LDL particles (nmol/L)
Total	1491.9 ± 415.8	1410.6 ± 443.1	<0.05
IDL	40.8 (10.2, 80.3)	18.0 (0.0, 53.5)	<0.01
Large	524.9 ± 283.8	514.8 ± 224.1	0.67
Small	915.1 ± 523.9	861.6 ± 511.1	0.27
HDL particles (μmol/L)
Total	31.5 ± 5.7	35.0 ± 6.1	<0.01
Large	5.2 ± 3.2	8.4 ± 3.8	<0.01
Medium	0.06 (0.00, 1.22)	1.10 (0.00, 3.30)	<0.01
Small	25.2 ± 25.2	23.9 ± 23.9	<0.01
Lipoprotein particle size (nm)
VLDL	49.6 ± 7.9	44.0 ± 7.0	<0.01
LDL	20.9 ± 0.9	21.1 ± 0.8	0.15
HDL	8.6 ± 0.5	9.1 ± 0.4	<0.01

VLDL: very low density lipoprotein, LDL: low-density lipoprotein, IDL: intermediate-density lipoprotein, HDL: high-density lipoprotein

Values are expressed as mean (± standard deviation) or median (inter-quartile range) for continuous variables.