Table 1. Characteristics of participants, plasma coffee polyphenols and plasma biomarkers of diabetes risk.

Characteristic	Means±s.d. (n=57)
Age (years)	52.0±8.0
Weight (kg)	54.2±9.0
Body mass index (kg m−2)	22.5±4.1
Body fat percentage	24.6±6.4
Systolic blood pressure (mmHg)	116.8±12.1
Diastolic blood pressure (mmHg)	71.9±9.5
Plasma caffeic acid (nM)	54.76±40.21
Plasma chlorogenic acid (nM)	1.86±2.01
Glucose (mg dl−1)	94.18±36.55
Glycated hemoglobin (%)	5.44±0.96
Adiponectin (μg ml−1)	12.65±4.92
Insulin (μU ml−1)	4.82±3.13
C-reactive protein (mg dl−1)	0.10±0.21