Table 2 Risk estimates of high 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 | 0.76(0.49-1.02) | 0.00 | 0.73 | 0.37 | 0.16 |
Country | |||||||
Japan | 2 | 78 | 1.67(0.46-2.87) | 0.90 | 0.00 | 1.00 | NA |
China | 7 | 3213 | 0.73(0.44-1.02) | 0.00 | 0.79 | 0.12 | 0.05 |
Northern Iran | 1 | 266 | 0.65 (0.32-1.31) | NA | NA | NA | NA |
Study design | |||||||
Cohort studies | 2 | 78 | 1.67(0.46-2.87) | 0.90 | 0.00 | 1.00 | NA |
Case control | 8 | 3479 | 0.72(0.45-0.98) | 0.00 | 0.76 | 0.07 | 0.02 |
Participates source | |||||||
PCC | 7 | 3329 | 0.71 (0.43-0.98) | 0.00 | 0.78 | 0.05 | 0.02 |
HCC | 1 | 150 | 0.92 (0.49-2.32) | NA | NA | NA | NA |
Gender | |||||||
Male | 2 | 845 | 1.04(0.48-1.60) | 0.05 | 0.73 | 1.00 | NA |
Female | 2 | 412 | 0.32(0.10-0.54) | 0.75 | 0.00 | 1.00 | NA |