Table 1 shows the comparison of the demographic and clinical characteristics of the ethnic cohorts. The mean LP measurements were 5.54 ± 0.32 mm for Whites (largest), 5.38 ± 0.32 mm for Asians, 5.32 ± 0.30 mm for Hispanics (smallest) and 5.40 ± 0.28 mm for African-Americans. The mean RLP measurements were 0.230 ± 0.010 for whites, 0.222 ± 0.010 for Asians, 0.224 ± 0.010 for Hispanics and 0.224 ± 0.010 for African-Americans.