Question 2

1319 participants aged 55-85 years from the Hunter Community Study (HCS) were questioned on the prevalence of severe cold symptoms at the age of 55 and again at the age of 58 years. At age 55, 356 (27%) participants were reported to have severe colds in the past 12 months compared to 468 (35.5%) at age 58.

a) Draw a 2 by 2 table

b) Is there any evidence of a difference in the effect?

c) Write a summary of what the results show.