Table 1.

Baseline Characteristics of MGTT Participants

	GTE (n=538)	Placebo (n=537)	P-value
Age at baseline, y	59.9 (5.0)	59.6 (5.1)	0.35
Body weight, kg	67.4 (10.6)	67.9 (10.5)	0.41
Height, cm	163.1 (9.1)	164.0 (8.7)	0.11
Body mass index, kg/m2	25.8 (8.7)	25.6 (8.1)	0.81
Waist-hip ratio	0.84 (0.10)	0.83 (0.10)	0.26
Caucasian, n (%)	515 (97.9)	505 (96.9)	0.37
Smoking status, n (%)			0.98
Never	357 (68.1)	356 (68.2)
Former	167 (31.9)	166 (31.8)
Alcohol, drinks/weeka	3.3 (3.0)	3.4 (3.0)	0.77
Physical activity, MET-hr/week	45.3 (53.1)	51.4 (104.0)	0.23
Education, n (%)			0.15
High school or less	33 (6.3)	39 (7.5)
Some college	112 (21.4)	88 (17.0)
College degree	236 (45.0)	225 (43.4)
Postgraduate/professional degree	143 (27.3)	166 (32.1)
Age at first live birth, yb	27.8 (5.4)	28.4 (5.5)	0.16
Years postmenopausal	10.9 (7.8)	10.3 (7.2)	0.20
Family history of breast cancer, n (%)			0.58
No	384 (74.7)	394 (76.2)
Yes	130 (25.3)	123 (23.8)
Total energy intake, kcal/d	1438.3 (537.5)	1447.5 (524.7)	0.79
Protein, g/d	58.9 (24.2)	57.6 (22.2)	0.42
% Energy from protein	16.3 (2.8)	16.0 (2.7)	0.06
Fat, g/d	53.3 (25.0)	54.1 (25.3)	0.63
% Energy from fat	32.9 (6.8)	33.14 (6.5)	0.55
Total Carbohydrate, g/d	179.3 (67.9)	181.9 (69.5)	0.55
% Energy from carbohydrate	50.4 (7.5)	50.4 (7.3)	0.95
Dietary fiber, g/d	17.5 (8.2)	17.7 (8.0)	0.72
Tea, servings/weekc	4.0 (3.8)	4.3 (4.4)	0.44
Caffeine, mg/d	353.6 (312.1)	379.1 (322.7)	0.22

Data presented as means (SD) for continuous variables and as frequencies (%) for categorical variables.

^aAmong alcohol drinkers only. GTE: n=418; Placebo: n=434.:

^bAmong parous women only. GTE: n=407; Placebo: n=393.

^cAmong tea drinkers only. GTE: n=275; Placebo: n=289.:

Abbreviations: GTE, green tea extract; MET-hr, metabolic equivalent hours; MGTT, Minnesota Green Tea Trial.