Table 2

Correlation coefficients for adiponectin, C-reactive protein, interleukin-6, and fetuin-A concentrations and markers of glucose metabolism at baseline

Adiponectin (μg/mL)

C-reactive Protein (mg/L)^a

Interleukin-6 (pg/mL)^a

Fetuin-A (μg/mL)^a

Glucose (mmol/L)^b

Fasting^a

-0.29

0.15

0.004

0.11

2-hour

-0.25

0.16

0.20

0.26

Area under the curve

-0.22

0.13

0.05

0.02

Insulin (pmol/L)

Fasting^a

-0.06

0.23

0.17

0.33^c

2-hour^a

-0.21

0.30

0.43^c

0.30

Area under the curve

-0.17

0.22

0.43^c

0.31^c

CISI (mmol/L^-1 * pmol/L^-1)^a

0.13

-0.26

-0.27

-0.33^c

Insulin_{30 min}/Glucose_{30 min}^b

-0.11

0.06

0.40^c

0.24

HOMA-IR^b

-0.04

0.22

0.15

0.34^c

Spearman correlation coefficients have been adjusted for age, sex, and baseline BMI.

CISI, composite insulin sensitivity index; HOMA, homeostasis model assessment.

^a Values were log transformed due to significant departures from normality.

^b One participant missing baseline fasting glucose measurement (Decaffeinated coffee treatment group).

^c P-value < 0.05.

Wedick et al. Nutrition Journal 2011 10:93   doi:10.1186/1475-2891-10-93