Table 2.
MMSE-J scores before and after 3 months of green tea consumption.
| Cognitive Function (MMSE-J Score) | Green Tea Consumption (2 g/day) | ||
|---|---|---|---|
| Before | After | p Value | |
| All subjects (n = 12) | |||
| Total MMSE-J score (max, 30) | 15.3 ± 7.7 | 17.0 ± 8.2 | 0.03 t |
| Orientation (max, 10) | 4.2 ± 3.1 | 4.3 ± 3.9 | 0.96 w |
| Short-term memory (max, 6) | 2.0 ± 1.8 | 3.2 ± 1.8 | 0.01 t |
| Attention and calculation (max, 5) | 2.1 ± 2.0 | 2.0 ± 2.3 | 0.91 w |
| Language (max, 8) | 6.7 ± 1.7 | 6.9 ± 1.4 | 0.46 w |
| Visual construction (max, 1) | 0.4 ± 0.5 | 0.7 ± 0.5 | 0.08 w |
| Vascular dementia (n = 8) | |||
| Total MMSE-J score (max, 30) | 18.4 ± 6.5 | 20.6 ± 6.7 | 0.03 t |
| Orientation (max, 10) | 5.1 ± 3.3 | 5.8 ± 3.8 | 0.11 t |
| Short-term memory (max, 6) | 2.6 ± 1.6 | 4.0 ± 1.2 | 0.04 w |
| Attention and calculation (max, 5) | 2.8 ± 1.9 | 2.5 ± 2.3 | 0.68 w |
| Language (max, 8) | 7.4 ± 0.9 | 7.5 ± 0.9 | 0.32 w |
| Visual construction (max, 1) | 0.5 ± 0.5 | 0.8 ± 0.5 | 0.16 w |
| Stratified analysis at each stages of cognitive dysfunction | |||
| Total MMSE-J score (max 30) | |||
| MCI (n = 2) | 26.5 ± 0.7 | 29.0 ± 1.4 | 0.34 t |
| Mild to moderate (n = 6) | 17.3 ± 3.7 | 18.8 ± 4.3 | 0.19 t |
| Severe (n = 4) | 6.8 ± 1.7 | 8.3 ± 3.4 | 0.32 t |
Values: Mean ± SD. Each p value was calculated using the following statistical method: t paired t-test, w Wilcoxon signed-rank test. MMSE-J, Mini-Mental State Examination Japanese version; MCI, Mild cognitive impairment.