Table 3 Risk estimates of medium 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 | 0.86(0.70-1.03) | 0.00 | 0.56 | 0.24 | 0.22 |
Country | |||||||
Japan | 2 | 78 | 1.14(0.46-2.87) | 0.90 | 0.00 | 0.26 | 0.17 |
China | 7 | 3213 | 0.86 (0.67-1.05) | 0.00 | 0.67 | 0.04 | 0.03 |
Northern Iran | 1 | 266 | 0.65 (0.32-1.31) | NA | NA | NA | NA |
Study design | |||||||
Cohort studies | 2 | 78 | 1.14(0.46-2.87) | 0.90 | 0.00 | 0.26 | 0.17 |
Case control | 8 | 3479 | 0.85(0.67-1.02) | 0.00 | 0.65 | 0.03 | 0.02 |
Participates source | |||||||
PCC | 7 | 3329 | 0.82(0.63-1.01) | 0.00 | 0.69 | 0.03 | 0.01 |
HCC | 1 | 150 | 1.13(0.69-1.57) | 0.77 | 0.00 | 0.30 | 0.01 |
Gender | |||||||
Male | 2 | 845 | 1.04(0.49-1.59) | 0.05 | 0.74 | 1.00 | NA |
Female | 2 | 412 | 0.43(0.21-0.66) | 0.35 | 0.00 | 1.00 | NA |