Coffee and tea consumption in relation to inflammation and basal glucose metabolism in a multi-ethnic Asian population: a cross-sectional study

Table 4 Geometric means (95% CI) of glycemic and inflammatory parameters by categories of Oolong tea consumption^a

	never or < 1 cup per week	2-6 cups per week		Ptrend^b
Fasting plasma glucose (mmol/L)
Model-1^c	4.84 (4.82 - 4.86)	4.82 (4.77 - 4.87)	4.86 (4.81 - 4.92)	0.591
Model-2	4.75 (4.69 - 4.82)	4.75 (4.68 - 4.82)	4.76 (4.68 - 4.83)	1.000
HOMA-IR
Model-1	1.56 (1.51 - 1.60)	1.56 (1.47 - 1.65)	1.68 (1.57 - 1.79)	0.044
Model-2	1.41 (1.32 - 1.50)	1.40 (1.30 - 1.51)	1.41 (1.30 - 1.53)	0.940
HOMA-beta
Model-1	102.50 (100.2 - 104.85)	105.31 (100.28 - 110.60)	103.70 (98.02 - 109.71)	0.511
Model-2	103.83 (97.48 - 110.60)	106.22 (98.69 - 114.32)	105.89 (97.91 - 114.52)	0.428
HbA1c %
Model-1	5.78 (5.76 - 5.81)	5.76 (5.71 - 5.80)	5.81 (5.76 - 5.87)	0.461
Model-2	5.72 (5.66 - 5.78)	5.71 (5.64 - 5.78)	5.73 (5.66 - 5.81)	0.685
Adiponectin- high molecular weight (µg/ml)
Model-1	1.03 (1.00 - 1.06)	1.04 (0.97 - 1.11)	0.96 (0.89 - 1.03)	0.105
Model-2	1.01 (0.93 - 1.09)	1.04 (0.94 - 1.14)	0.99 (0.89 - 1.09)	0.829
CRP (mg/L)
Model-1	1.48 (1.41 - 1.55)	1.46 (1.32 - 1.62)	1.63 (1.45 - 1.83)	0.166
Model-2	1.29 (1.14 - 1.45)	1.30 (1.13 - 1.49)	1.35 (1.17 - 1.56)	0.397

^a HOMA-IR, homeostatic model assessment-insulin resistance; HOMA-beta, homeostatic model assessment-beta cell function; CRP, C-reactive protein. Numbers of participants differ across outcomes because participants with outlier values (response values > 4 SD from mean) were excluded. Numbers were as follows: fasting plasma glucose: 3058, 585, 431 HOMA-IR: 3087, 588, 433 HOMA-beta: 3080, 588, 427 HbA1c: 2493, 482, 378 HMW adiponectin: 3020, 572, 425 CRP: 3012, 564, 419.
^{b, c} For these footnotes please refer to Table 3

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