Table 2.
Subgroup analysis of relationship between red meat consumption and risk of MetS.
| Stratification | Number of studies | Pooled RR | 95% CI | P-value | Heterogeneity |
|---|---|---|---|---|---|
| All | 8 | 1.35 | 1.13, 1.62 | P = 0.001 |
P = 0.03; I2 = 54% |
| Follow-up | |||||
| <5 | 3 | 1.36 | 0.85, 2.17 | P = 0.20 |
P =0.03; I2 = 70% |
| >5 | 5 | 1.36 | 1.09, 1.70 | P = 0.006 |
P = 0.08; I2 = 53% |
| Diagnostic criteria of MetS | |||||
| NCEP ATP III | 4 | 1.51 | 0.91, 2.52 | P = 0.11 |
P = 0.05; I2 = 62% |
| Non-NCEP ATP III | 4 | 1.34 | 1.12, 1.62 | P = 0.002 |
P = 0.06; I2 = 59% |
| Geographical region | |||||
| Asia | 4 | 1.21 | 0.94, 1.56 | P = 0.15 |
P = 0.03; I2 = 67% |
| Non-Asia | 4 | 1.51 | 1.29, 1.77 | P < 0.001 |
P = 0.39; I2 = 1% |
| Sample size | |||||
| <1,000 | 3 | 1.65 | 1.30, 2.08 | P < 0.001 |
P = 0.30; I2 = 16% |
| >1,000 | 5 | 1.25 | 1.02, 1.52 | P = 0.03 |
P = 0.05; I2 = 58% |
| Adjustment of BMI | |||||
| Adjusted | 5 | 1.40 | 1.23, 1.60 | P < 0.001 |
P = 0.15; I2 = 41% |
| Unadjusted | 3 | 1.36 | 0.89, 2.08 | P = 0.16 |
P = 0.02; I2 = 74% |
| Adjustment of physical activity | |||||
| Adjusted | 5 | 1.48 | 1.29, 1.71 | P < 0.001 |
P = 0.53; I2 = 0% |
| Unadjusted | 3 | 1.14 | 0.81, 1.61 | P = 0.46 |
P = 0.02; I2 = 75% |