TABLE 1.
Baseline demographic and other selected characteristics of study participants1
| Variables | GTE (n = 463) | Placebo (n = 473) | P | |
| Age at baseline, y | 60.02 ± 4.89 | 59.65 ± 5.04 | 0.26 | |
| Weight, kg | 67.34 ± 10.66 | 67.40 ± 10.33 | 0.93 | |
| BMI, kg/m2 | 25.16 ± 3.72 | 25.01 ± 3.73 | 0.53 | |
| Waist-to-hip ratio2 | 0.84 ± 0.07 | 0.83 ± 0.07 | 0.22 | |
| Race,3 n (%) | ||||
| White | 453 (98.05) | 457 (97.03) | 0.31 | |
| Nonwhite | 9 (1.95) | 14 (2.97) | ||
| Ethnicity,4 n (%) | ||||
| Hispanic | 5 (1.09) | 4 (0.86) | 0.72 | |
| Non-Hispanic | 453 (98.91) | 463 (99.14) | ||
| Smoking status,5 n (%) | ||||
| Never | 316 (68.55) | 324 (68.64) | 0.97 | |
| Former | 145 (31.45) | 148 (31.36) | ||
| Educational level (degree),6 n (%) | ||||
| High school or less | 27 (5.86) | 31 (6.61) | 0.08 | |
| Some college | 313 (67.90) | 286 (60.98) | ||
| Postgraduate or professional | 121 (26.25) | 152 (32.41) | ||
| Regular use of vitamin and/or mineral supplements,7,8 n (%) | ||||
| No | 42 (9.09) | 66 (13.95) | 0.02 | |
| Yes | 420 (90.91) | 407 (86.05) | ||
| Regular use of aspirin,8,9 n (%) | ||||
| No | 339 (73.22) | 341 (72.25) | 0.74 | |
| Yes | 124 (26.78) | 131 (27.75) | ||
| Regular use of statins,8,10 n (%) | ||||
| No | 360 (78.43) | 378 (80.60) | 0.41 | |
| Yes | 99 (21.57) | 91 (19.40) | ||
| Consumption of soy,8,11 n (%) | ||||
| No | 327 (71.40) | 307 (66.16) | 0.09 | |
| Yes | 131 (28.60) | 157 (33.84) | ||
| Times/wk12 | 2.39 ± 2.68 | 1.98 ± 2.48 | 0.21 | |
| Regular consumption of black and/or green tea,8 n (%) | ||||
| No | 187 (40.39) | 179 (37.84) | 0.21 | |
| Yes | 275 (59.40) | 289 (61.10) | ||
| Unknown | 1 (0.22) | 5 (1.06) | ||
| Years since menopause13 | 11.07 ± 7.63 | 10.32 ± 7.24 | 0.13 | |
| Self-reported physical activity,9 MET-h/wk | 45.71 ± 53.97 | 51.07 ± 106.95 | 0.33 |
Values are means ± SDs for continuous variables or frequencies (percentages) for categorical variables. P values were derived from Student’s t test for continuous variables and Pearson’s chi-square test for categorical variables. GTE, green tea extract; MET-h, metabolic equivalent hours.
2–6Participant numbers for the GTE and placebo groups, respectively, are as follows: 2n = 461 and 473, 3462 and 471, 4458 and 467, 5461 and 472, and 6461 and 469.
n = 462 for the GTE group.
Self-reported on the baseline health history questionnaire.
n = 472 for the placebo group.
10–13Participant numbers for the GTE and placebo groups, respectively, are as follows: 10n = 459 and 469, 11458 and 464, 12119 and 143, and 13440 and 453.