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Table 1 TFAs concentrations by selected population characteristics of U.S. adults (Age ≥ 20 Years), NHANES 1999–2000

From: Plasma trans-fatty acids levels and mortality: a cohort study based on 1999–2000 National Health and Nutrition Examination Survey (NHANES)

Population characteristics Number Unweighted, % Weighted, % Elaidic acid (C18:1 t9)
Weighted mean (SE) μM
Vaccenic acid (C18:1 t11)
Weighted mean (SE) μM
Palmitelaidic acid (C16:1 t9)
Weighted mean (SE) μM
Linolelaidic acid (C18:2 t9, 12)
Weighted mean (SE) μM
Gender
 Male (ref) 701 48.1 48.8 36.40(1.87) 43.12(1.96) 7.43(0.28) 3.04(0.15)
 Female 755 51.9 51.2 37.99(1.41) 41.24(1.36) 7.67(0.15) 3.20(0.11)
Age, y
 20–39 (ref) 509 35 42.8 34.98(1.27) 41.23(1.33) 7.30(0.19) 2.96(0.10)
 40–59 429 29.5 36.0 39.26(2.47) * 43.62(2.27) 7.60(0.34) 3.26(0.19) *
 60 518 35.5 21.2 38.27(1.36) * 41.57(1.27) 7.97(0.22) * 3.21(0.13) *
Race
 Non-Hispanic White (ref) 695 47.7 75.0 38.97(1.75) 43.83(1.67) 7.97(0.19) 3.31(0.15)
 Non-Hispanic Black 222 15.2 8.5 31.52(1.07) * 37.80(1.19) * 6.00(0.29) * 2.39(0.08) *
 Mexican American 424 29.1 6.4 37.07(2.31) 41.76(2.39) 7.27(0.31) * 2.94(0.18) *
 Other Hispanic 80 5.5 7.1 26.82(2.27) * 33.41(2.26) * 5.87(0.12) * 2.43(0.08) *
 Other race / multiracial 35 2.5 3.0 34.49(5.04) 34.28(6.28) 6.05(0.75) * 2.59(0.21) *
BMI, kg/m2
 Underweight (<18.5) 24 1.6 2.4 31.68(1.28) 40.01(1.96) 6.88(0.43) 2.28(0.14)
 Normal weight (18.5–24.9) (ref) 459 31.5 36.3 33.98(1.60) 39.32(1.62) 7.04(0.20) 2.69(0.11)
 Overweight (25–29.9) 490 33.7 31.6 36.21(1.52) 41.59(1.66) 7.36(0.27) 3.21(0.15) *
 Obese (>30) 483 33.2 29.7 42.67(1.88) * 46.39(1.79) * 8.43(0.21) * 3.62(0.14) *
Alcohol use
 No (ref) 454 31.2 26.1 39.41(1.22) 43.44(0.89) 8.12(0.16) 3.12(0.12)
 Yes 1002 68.8 73.9 36.44(1.67) * 41.71(1.71) 7.35(0.18) * 3.12(0.13)
Smoking status
 Nonsmoker (ref) 720 49.5 46.8 35.58(1.82) 41.08(1.75) 7.53(0.22) 2.94(0.13)
 Former 426 29.2 28.9 39.07(1.82) * 43.70(1.71) 8.08(0.26) 3.29(0.16) *
 Current 310 21.3 24.3 38.16(1.92) 42.40(2.08) 6.97(0.32) 3.27(0.16) *
Hypertensiona
 No (ref) 941 64.6 72.4 36.42(1.75) 42.09(1.76) 7.49(0.24) 3.02(0.13)
 Yes 515 35.4 27.6 39.3(1.90) 42.35(1.36) 7.71(0.21) 3.38(0.13) *
Diabetesb
 No (ref) 1338 91.9 94.9 36.48(1.44) 41.57(1.34) 7.43(0.16) 3.09(0.12)
 Yes 118 8.1 5.1 50.89(5.37) * 53.12(3.89) * 9.81(0.71) * 3.79(0.20)*
Self-reported cardiovascular diseases history
 No (ref) 1358 93.3 94.7 37.05(1.51) 42.16(1.40) 7.53(0.16) 3.11(0.12)
 Yes 98 6.7 5.3 40.16(2.70) 42.03(2.97) 7.92(0.65) 3.31(0.19)
Mortality status, n (%)
 Assumed alive (ref) 1235 84.8 90.0 36.65(1.45) 41.82(1.39) 7.45(0.17) 3.12(0.12)
 Assumed deceased 221 15.2 10.0 42.27(3.00) * 45.25(2.86) 8.42(0.44) * 3.18(0.15)
Overall 1456 100 100 37.22(1.44) 42.16(1.33) 7.55(0.15) 3.12(0.11)
  1. * P < 0.05 for a significant difference in tran-fatty acids concentrations in the category compared to reference (first category listed) using weighted ANOVA or two-samples t tests
  2. aHypertension was defined as systolic and diastolic blood pressures ≥140/90 mmHg or use of antihypertensive treatment
  3. bDiabetes was defined as a fasting glucose value ≥7.0 mmol/L or use of insulin or oral hypoglycemic agent