Table 1.
Baseline characteristics and mean 3-day dietary intake of study participants, by treatment group.1
| GTE (n=30) | Placebo (n=30) | P-value | |
|---|---|---|---|
| Age, y | 61.0 (59.2, 62.8) | 60.8 (59.0, 62.6) | 0.88 |
| White, non-Hispanic, n (%) | 29 (96.7) | 30 (100) | 1.002 |
| COMT genotype, n (%) | 1.00 | ||
| A/A | 10 (33.3) | 10 (33.3) | |
| G/A | 10 (33.3) | 10 (33.3) | |
| G/G | 10 (33.3) | 10 (33.3) | |
| Weight, kg | 74.2 (71.1, 77.4) | 75.3 (72.1, 78.4) | 0.64 |
| Body mass index, kg/m2 | 28.2 (27.1, 29.4) | 28.3 (27.2, 29.5) | 0.91 |
| Waist-to-hip ratio | 0.87 (0.83, 0.89) | 0.85 (0.82, 0.87) | 0.31 |
| Years postmenopausala | 8.8 (6.3, 12.2) | 7.8 (5.6, 10.8) | 0.60 |
| Type of menopause, n (%) | 0.75 | ||
| Natural | 23 (76.7) | 24 (80.0) | |
| Surgical | 7 (23.3) | 6 (20.0) | |
| Education, n (%) | 0.0012 | ||
| Masters/PhD/Professional | 10 (33.3) | 8 (26.7) | |
| College degree | 8 (26.7) | 15 (50.0) | |
| Some college | 12 (40.0) | 2 (6.7) | |
| High school or below | 0 | 5 (16.7) | |
| Physical activity, MET-hr/week | 39.5 (26.2, 52.7) | 43.8 (30.6, 57.1) | 0.64 |
| Dietary variables | |||
| Total energy, kcal/day | 1760 (1590, 1930) | 1850 (1680, 2020) | 0.48 |
| Protein, g/day | 73.4 (65.7, 81.0) | 78.6 (70.9, 86.2) | 0.35 |
| Total fat, g/day | 67.5 (57.6, 77.4) | 73.9 (64.0, 83.8) | 0.37 |
| Dietary cholesterol, mg | 230 (190, 271) | 238 (197, 278) | 0.79 |
| Saturated fat, g | 23.4 (19.9, 26.9) | 24.5 (21.0, 28.0) | 0.66 |
| MUFAb, g | 11.9 (9.7, 14.6) | 13.4 (10.9, 16.4) | 0.44 |
| PUFA, g | 7.0 (5.0, 9.0) | 8.5 (6.5, 10.5) | 0.31 |
| Omega-3 FAb, g | 0.5 (0.4, 0.7) | 0.6 (0.5, 0.8) | 0.65 |
| Omega-6 FAb, g | 1.2 (1.0, 1.5) | 1.3 (1.1, 1.7) | 0.38 |
| Total carbohydrate, g/day | 217 (192, 241) | 216 (191, 240) | 0.95 |
| Dietary fiber, g/day | 19.0 (16.8, 21.2) | 20.6 (18.4, 22.9) | 0.31 |
| Soluble fiber, g | 1.8 (1.4, 2.2) | 1.6 (1.2, 2.0) | 0.42 |
| Alcohol3, g/day | 0.1 (0.0, 0.3) | 0.1 (0.0, 0.4) | 0.75 |
| Caffeine3, mg/day | 36.8 (13.6, 99.9) | 46.2 (17.0, 125.3) | 0.75 |
1
Continuous data expressed as arithmetic mean (95% confidence interval) unless otherwise indicated by superscript. Categorical variables compared using Chi-square test and expressed as n (%).
2
Fisher's exact test used for comparison.
3
Data expressed as geometric mean (95% confidence interval).
Abbreviations: FA, fatty acid; GTE, green tea extract; MET-hr, metabolic equivalent hours; MUFA, monounsaturated fatty acid; PUFA, polyunsaturated fatty acid.