Table 2

Mean (SE) and frequency (%) of baseline characteristics by plasma phospholipid n-3 FA category,* MESA, N = 5,697

CharacteristicLow n-3 category** (n = 4,399)High n-3 category** (n = 1,304)P value
n-3 FAs, mean (SE)*3.9 (0.02)7.5 (0.03)<0.001
EPA, % total0.64 (0.01)1.79 (0.02)<0.001
DHA, % total3.25 (0.01)5.71 (0.03)<0.001
Age, years, mean (SE)61.3 (0.2)63.0 (0.3)<0.001
Sex, n (% women)2,313 (53)744 (59)0.005
Race, n (%)
 Black1,056 (24)405 (31)<0.001
 Chinese352 (8)352 (27)<0.001
 Hispanic1,012 (23)156 (12)<0.001
 White1,979 (45)391 (30)<0.001
Education, n (%)
 Less than HS763 (17)174 (14)0.002
 HS graduate818 (19)204 (15)0.003
 Some college1,292 (29)333 (26)0.04
 College graduate770 (18)250 (18)0.83
 Graduate school750 (17)343 (27)<0.001
Current smoking, n (%)653 (15)92 (8)<0.001
Current alcohol use, n (%)1,820 (43)573 (38)<0.001
BMI, kg/m228.2 (0.1)27.3 (0.1)<0.001
Waist circumference, cm97.8 (0.2)94.9 (0.4)<0.001
hs-CRP, mg/dL3.8 (0.1)3.1 (0.1)<0.001
Glucose, mg/dL89.7 (0.2)89.5 (0.3)0.59
Insulin, mU/L9.7 (0.1)8.9 (0.2)<0.001
  • Adjusted for age, sex, race, education, and field center.

  • *n-3 FAs = EPA + DHA.

  • **Low n-3 FA category <75th percentile; high n-3 FA category ≥75th percentile. HS, high school.