From: Association between tea and coffee consumption and brain cancer risk: an updated meta-analysis
Subgroups | Tea consumption (highest vs. lowest category) | Coffee consumption (highest vs. lowest category) | ||||||
---|---|---|---|---|---|---|---|---|
Studies, n | RR (95% CI) | I2 (%) | P heterogeneity | Studies, n | RR (95% CI) | I2 (%) | P heterogeneity | |
All studies | 8 | 0.897 (0.739–1.088) | 29.9 | 0.189 | 11 | 0.785 (0.580–0.984) | 65.6 | 0.001 |
Glioma | 7 | 0.846 (0.683–1.047) | 24.6 | 0.241 | 10 | 0.760 (0.548–0.972) | 63.9 | 0.003 |
Cohort | 6 | 0.891 (0.755–1.051) | 0.0 | 0.471 | 8 | 0.858 (0.700–0.992) | 20.1 | 0.270 |
Case-control | 2 | 0.658 (0.199–2.179) | 81.5 | 0.020 | 3 | 0.507 (0.142–1.810) | 90.1 | < 0.001 |
America | 4 | 0.798 (0.646–0.986) | 0.0 | 0.595 | 6 | 0.912 (0.740–1.124) | 0.0 | 0.520 |
Europe | 2 | 1.080 (0.828–1.410) | 0.0 | 0.792 | 2 | 1.070 (0.793–1.444) | 0.0 | 0.433 |
Asia | 2 | 0.643 (0.205–2.016) | 79.9 | 0.026 | 2 | 0.217 (0.042–0.896) | 84.9 | 0.010 |
Oceania | – | – | – | – | 1 | – | – | – |