TABLE 2.
Association of frequency of tea consumption with the risk of stroke among 487,377 participants1
| Frequency of tea consumption | ||||||
|---|---|---|---|---|---|---|
| Stroke type | Participants, n | Never | Occasionally | Weekly | Daily | P trend |
| Participants, n | 487,377 | 170,334 | 153,122 | 35,641 | 128,280 | |
| Person years, n | 4,289,584 | 1,492,052 | 1,353,461 | 316,773 | 1,127,298 | |
| Total stroke2 | ||||||
| Cases, n | 38,727 | 16,283 | 10,628 | 2341 | 9475 | |
| Model 13 | 1.00 | 0.95 (0.93, 0.98) | 0.94 (0.90, 0.99) | 0.94 (0.91, 0.97) | <0.001 | |
| Model 24 | 1.00 | 0.96 (0.94, 0.99) | 0.94 (0.90, 0.98) | 0.92 (0.89, 0.95) | <0.001 | |
| Ischemic stroke | ||||||
| Cases, n | 30,312 | 13,291 | 8394 | 1798 | 6829 | |
| Model 13 | 1.00 | 0.96 (0.93, 0.98) | 0.96 (0.91, 1.01) | 0.96 (0.93, 0.999) | 0.040 | |
| Model 24 | 1.00 | 0.96 (0.93, 0.98) | 0.94 (0.90, 0.995) | 0.92 (0.89, 0.96) | <0.001 | |
| Hemorrhagic stroke | ||||||
| Cases, n | 6945 | 2421 | 1836 | 449 | 2239 | |
| Model 13 | 1.00 | 0.92 (0.86, 0.98) | 0.86 (0.77, 0.95) | 0.85 (0.79, 0.92) | <0.001 | |
| Model 24 | 1.00 | 0.96 (0.90, 1.03) | 0.89 (0.80, 0.99) | 0.86 (0.80, 0.93) | <0.001 | |
1Values were obtained from a Cox proportional hazards analysis. Ptrend, P for the linear trend test.
2Including hemorrhagic stroke, ischemic stroke, and stroke of unknown type.
3Model 1: HRs (95% CIs) were achieved after adjusting for age and sex.
4Model 2: HRs (95% CIs) were achieved after adjusting for age; sex; marital status; education; annual household income; smoking status; alcohol consumption; physical activity; BMI; history of hypertension; history of diabetes; intake frequencies of red meat, fresh fruits, and fresh vegetables; and family history of stroke.