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Pooled Results of Risk Ratios for Polyps Formation for Vitamins C+E with Carotenoids Vs. Placebo
| Author (Year) | Intervention* | Total n | RR (95% CI) |
|---|---|---|---|
| Greenberg (1994)37 | C+AT+BC | 751 | 1.04 (0.79, 1.36) |
| Hofstad (1998)39 | C+AT+BC+Ca | 93 | 0.71 (0.50, 1.01) |
| Roncucci (1993)40 | C+AT+A | 209 | 0.16 (0.06, 0.43) |
| Pooled Random Effects Estimate | 0.60† (0.31, 1.16) |
χ2test of heterogeneity P-value = 0.001.
A, vitamin A; AT, α-tocopherol; BC, β-carotene; C, vitamin C (ascorbic acid); Ca, calcium.
