The study and its comparison
A randomized controlled trial enrolled 14,641 participants. Its population was male us physicians aged at least fifty. The comparison used daily multivitamin versus placebo, with observation over median 11.2 years. [1]
Total cancer excluding nonmelanoma skin cancer occurred at rates of 17.0 versus 18.3 per thousand person-years. The hazard ratio was 0.92, with its confidence interval ending at 0.998. Prostate cancer, colorectal cancer and cancer mortality did not differ significantly. [1]
What the finding establishes
The narrowly significant total-cancer result does not establish that every cancer type is prevented. Male physicians are a selected population, and a mixture cannot isolate vitamin K or another component. Rates per person-year should not be presented as cumulative percentages. Funding and complete conflicts were not established from the retrieved abstract. [1]
A hypothetical distinction
Imagine 17 events per thousand person-years. That is an incidence rate, not a statement that seventeen percent of participants developed cancer.
| Detail | Interpretation |
|---|---|
| Measured outcome | Keep the endpoint specific |
| Study preparation | Not every retail product |
| Remaining uncertainty | Not resolved by a mechanism |
Sources for this article
- Multivitamins in the prevention of cancer in men: the Physicians' Health Study II randomized controlled trial.
Source consulted: 2026-09-19. This is a reference resource, not a claim that we conducted the studies or tested a product.