Table 5. Relations between doses of Green tea intake and AF;
| Groups | Controls (N = 242) | Atrial fibrillation (N = 155) | OR 95% CI | P |
|---|---|---|---|---|
| 0 | 158 | 246 | 1 | |
| 3 | 22 | 3 | 0.088 (0.026-0.297) | <0.001 |
| 4 | 45 | 18 | 0.257 (0.144-0.460) | <0.001 |
| 5 | 92 | 34 | 0.237 (0.153-0.369) | <0.001 |
| 6 | 47 | 39 | 0.533 (0.333-0.852) | <0.001 |
| 7 | 16 | 29 | 1.164 (0.612-2.213) | 0.643 |
| 8 | 17 | 27 | 1.020 (0.538-1.932) | 0.951 |
| 9 | 3 | 5 | 1.070 (0.252-4.542) | 0.926 |
| P for the trend | <0.001 |
1. AF, atrial fibrillation; OR, odds ratio; CI, confidence interval;
2. The frequency of green tea intake was rated on a 3-point scale ranging from low = “1” to high = “3”, the same to concentration and duration accordingly.
3. According to the final score, the green tea drinker was divided into 7 groups ranging from “3” to “9.