Table 1.

Anthropometric measures, glucose metabolism parameters, and serum adiponectin and C-reactive protein at baseline.

Parameter (unit)	Caffeinated coffee (n = 17)	Decaffeinated coffee (n = 15)	No coffee (n = 13)	P value*
Body weight (kg)	77 (70–84)	75 (71–80)	79 (78–83)	0.22
Waist circumference (cm)	93 (89–99)	91 (88–95)	95 (90–97)	0.46
Plasma glucose (mmol/L)
Fasting	6.0 (5.3–6.2)	6.1 (5.3–7.4)	5.8 (5.4–6.3)	0.68
2-hour	8.5 (7.3–9.9)	10.1 (7.7–12.8)	9.2 (7.4–12.9)	0.35
AUC†	18.3 (15.9–20.1)	20.6 (17.5–23.7)	20.8 (18.5–23.2)	0.16
Plasma insulin (pmol/L)
Fasting	57 (38–66)	34 (27–71)	58 (52–66)	0.53
2-hour	551 (347–868)	314 (187–565)	472 (312–854)	0.24
AUC†	999 (676–1289)	570 (376–978)	881 (629–1057)	0.13
Composite ISI	3.6 (2.3–4.6)	4.8 (2.4–7.9)	3.4 (2.1–5.0)	0.38
HOMA-IR	2.0 (1.3–2.5)	1.2 (0.9–3.3)	2.0 (1.8–2.9)	0.51
Total adiponectin (μg/mL)	4.9 (4.1–8.2)	5.8 (5.6–6.3)	4.8 (3.9–6.5)	0.66
HMW adiponectin (μg/mL)	2.6 (1.5–4.9)	3.1 (2.2–4.4)	2.2 (1.7–3.6)	0.73
C-reactive protein (mg/L)	0.49 (0.26–0.85)	0.23 (0.19–0.83)	0.42 (0.29–0.72)	0.24

AUC: area under the curve; HMW: high-molecular weight; HOMA-IR: homeostasis model assessment of insulin resistance; ISI: insulin sensitivity index.

Values are medians and interquartile ranges (25th and 75th percentiles) in parentheses.

*Overall difference based on Kruskal-Wallis test.

^†Hour was used for the time scale in the oral glucose tolerance test.