Question: Design with Iron Refer to Exercise. How could you find out whether iron caused the higher death rates associated in this study with its use? Describe the design of a study assuming you had 200 women to work with. Assume that you do not have to study the women for 19 years but, rather, will look at them for a much shorter time period, perhaps one or two years.
Exercise: Iron and Death Rate In February 2012, the magazine Health After 50 reported on the Iowa Women's Health Study. Experts used a questionnaire to collect data from 39,000 women 55-69 years old concerning their dietary supplements. After 19 years they looked at death rates. Many of the supplements were associated with a higher risk of death, iron being the most notable: The higher the dose of iron taken, the higher the death risk. Does this study show that consumption of iron causes higher death rates?