Table 4 Risk estimates of low green tea consumption with esophageal cancer by sex, geographic region and type of epidemiologic studies
From: Green tea consumption and risk of esophageal cancer: a meta-analysis of epidemiologic studies
No. of studies | No. of cases | RR or OR (95% CI) | Heterogeneity | Publication bias | |||
|---|---|---|---|---|---|---|---|
p | I2 | Begg’s test | Egger’s test | ||||
Overall | 10 | 3557 | 0.83(0.58-1.08) | 0.00 | 0.66 | 0.12 | 0.03 |
Country | |||||||
Japan | 2 | 78 | 0.96(0.01-1.92) | 0.59 | 0.00 | 1.00 | NA |
China | 7 | 3213 | 0.85(0.56-1.13) | 0.00 | 0.75 | 0.18 | 0.03 |
Northern Iran | 1 | 266 | 0.65 (0.32-1.31) | NA | NA | NA | NA |
Study design | |||||||
Cohort studies | 2 | 78 | 0.96 (0.01-1.92) | 0.59 | 0.00 | 1.00 | NA |
Case control | 8 | 3479 | 0.82 (0.56-1.09) | 0.00 | 0.72 | 0.07 | 0.01 |
Participates source | |||||||
PCC | 7 | 3329 | 0.78(0.51-1.05) | 0.00 | 0.73 | 0.03 | 0.01 |
HCC | 1 | 150 | 1.27(0.72-1.89) | NA | NA | NA | NA |
Gender | |||||||
Male | 2 | 845 | 1.04(0.48-1.61) | 0.06 | 0.72 | 1.00 | NA |
Female | 2 | 412 | 0.45(0.10-0.79) | 0.16 | 0.49 | 1.00 | NA |