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. Author manuscript; available in PMC: 2012 Mar 1.
Published in final edited form as: Brain Behav Immun. 2010 Nov 26;25(3):494–502. doi: 10.1016/j.bbi.2010.11.013

Table 1.

Demographic characteristics and mean biomarker values for Japanese and American participants (MIDJA and MIDUS).

Japanese (n = 382) Cau-American (n = 976) Afr-American (n = 233)
Gender1
 Male 168 (44.0%) 445 (45.6%) 76 (32.6%)
 Female 214 (56.0%) 531 (54.4%) 157 (67.4%)
Mean Age2 (at clinic visit) 55.5 (14.0) 58.4 (11.7) 53.6 (10.4)
Mean BMI3 (SD) 22.58 (2.96) 29.06 (5.84) 32.88 (8.57)
Mean IL-64 (SD) (pg/mL) 1.70 (1.99) 2.79 (2.30) 4.16 (3.72)
Mean sIL6r5 (SD) (ng/mL) 37.91 (9.55) 36.66 (10.27) 28.48 (7.93)
Mean CRP6 (SD) (mg/L) 0.75 (2.00) 2.71 (4.36) 4.50 (6.31)
Mean FBG7 (SD) (mg/dL) 319.1 (64.1) 339.5 (83.1) 388.0 (96.7)
1

Afr-Amer sample had proportionately more women and fewer men than the Cau-Amer and Japanese (p<.01). For all 3 groups, there were more female participants.

2

Although age ranges were similar, Cau-Americans were slightly older and the mean age of Afr-Americans was 2 years younger than Japanese (p<.001)

3

Japanese had significantly smaller BMIs (p<.001), and Cau-Americans were less overweight than the Afr-Americans (p<.001)

4

Japanese had significantly lower IL-6, and Afr-Amer were significantly above Cau-Americans (p<.01)

5

sIL-6r levels in Japanese were above Afr-Amer (p<.001), but not significantly above Cau-Amer (p=.52)

6

CRP in Japanese was dramatically below American values (p<.001); CRP in Afr-Americans was the highest (p<.001)

7

FBG in Japanese was below Americans (p<.001), and the levels in Afr-Americans were significantly above Cau-Americans (p=.026)