Assignment task: Batch 4 (C). Paganini-Hill A, Kawas CH, Corrada MM. Antioxidant vitamin intake and mortality: the Leisure World Cohort Study. Am J Epidemiol. 2015;181:120-6.
1. Tables 2 and 3 show that the association between dietary vitamin A and death is stronger in Model 1 than in Model 2
2. Do the findings provide any support for the value of vitamin supplements?
3. Why did the investigators calculate the HR values with both the entire period of follow-up and also after excluding deaths in the first five years.
4. To what extent do the findings from this study tell us whether a diet with a higher intake of vitamins (either from the diet or supplements) is beneficial for middle-aged people living in poverty?