Table 4.
Subgroup Analyses of the Studies on Processed Meat Consumption and Stroke Incidence
| Processed Meat | Stroke Incidence | |||
|---|---|---|---|---|
| No. | RR (95% CI) | I 2, % | P h Value | |
| Stroke subtype | ||||
| Ischemic | 5 | 1.10 (0.96–1.27) | 11.4 | 0.341 |
| Hemorrhagic | 5 | 1.19 (0.95–1.49) | 8.10 | 0.360 |
| Sex | ||||
| Male | 4 | 1.21 (1.09–1.34) | 0.00 | 0.480 |
| Female | 4 | 1.12 (1.01–1.24) | 0.00 | 0.476 |
| No. of cases | ||||
| <2000 | 4 | 1.22 (1.09–1.37) | 0.00 | 0.943 |
| ≥2000 | 4 | 1.10 (0.96–1.26) | 39.3 | 0.176 |
| Follow‐up duration | ||||
| <20 y | 4 | 1.12 (0.95–1.31) | 36.6 | 0.193 |
| ≥20 y | 4 | 1.17 (1.05–1.30) | 0.00 | 0.674 |
| Adjustment variable | ||||
| Education | ||||
| Yes | 6 | 1.16 (1.04–1.29) | 0.60 | 0.412 |
| No | 2 | 1.16 (1.01–1.33) | 20.8 | 0.261 |
| Family history of MI | ||||
| Yes | 4 | 1.18 (1.08–1.29) | 0.00 | 0.595 |
| No | 4 | 1.05 (0.85–1.28) | 6.00 | 0.363 |
| Fruit and vegetable intake | ||||
| Yes | 6 | 1.15 (1.05–1.26) | 16.6 | 0.307 |
| No | 2 | 1.24 (0.94–1.63) | 0.00 | 0.799 |
| Fish intake | ||||
| Yes | 4 | 1.12 (0.95–1.31) | 36.6 | 0.193 |
| No | 4 | 1.17 (1.05–1.30) | 0.00 | 0.674 |
| Use of aspirin | ||||
| Yes | 4 | 1.18 (1.08–1.29) | 0.00 | 0.595 |
| No | 4 | 1.05 (0.85–1.28) | 6.00 | 0.363 |
| Use of vitamin supplements | ||||
| Yes | 4 | 1.09 (0.94–1.27) | 34.0 | 0.208 |
| No | 4 | 1.22 (1.09–1.37) | 0.00 | 0.943 |
CI indicates confidence interval; MI, myocardial infarction; P h indicates P value for heterogeneity; RR, relative risk.