Question

supppose that a case control study was conducted to evaluate the relationship between artificial sweeteners and bladder cancer. 3000 cases and 3000 controls were enrolled in the study. Among the cases, 1293 had used artificial sweeteners. Of the controls, 855 had used sweeteners and 2145 had not. set up the two tables for these data. What measure of association/comparison should be used to assess the strength of the relationship between artificial sweeteners and bladder cancer. Calculate and interpret the measure: Show the formula

Answer 1

	cases	control	total
exposd	1293	855	2148
not exposed	1707	2145	3852
total	3000	3000	6000

Measure of association/comparison used to asses strength of the relationship between artificial sweetners and bladder cancer is Risk Ratio and Confidence level

Formula

Risk ratio = Number of controls who used artificial sweetener and developed cancer / Number of controls who used artificial sweetner and did not develop bladder cancer

Cofidence level = Number of controls who used artificial sweetener and developed cancer / Total infected controls