Question

Read the following research study and answer the following questions: A case control study was conducted to evaluate the relationship between direct sun exposure and skin cancer. 150 Cases and 100 controls were recruited from Al Wehda hospital. A data collecting method was distributed among both controls and cases. Analysis of data revealed that 70 of cases were exposed to active smoking while only 40 of controls were exposed. Construct a 2 by 2 table to demonstrate the two dichotomous variables for being a case & control and for being exposed & not exposed. Calculate odds of exposure among case and odds of exposure among controls? And the odds ratio? From the calculations of odds ratio, the exposure deemed risky, protective ご忻ぐ. ﹁n or no association and why? C- significant or not? Justify? D- If the 95% confidence interval was (1.249), is odds ratio statistically- What is the research question of this study? And what the result of this study suggest; approving or (ejecting the null hypothesis? /4 E Identify the dependent and independent variables What are possible confounders that may interfere with this study mention at least three? How confounders could be neutralized? 6o

Answer 1

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Oa

The odds ratio is the measure of association for a case-control study. It tells us how much higher the odds of exposure is among cases of a disease compared with controls. The odds ratio compares the odds of exposure to the factor of interest among cases to the odds of exposure to the factor among controls.

B.With the odds ratios it depicts that the exposure is risky because the cases are 1.3 higher than the controls .

D. Research question - a case cohort study is conducted to evaluate the relationship between direct sun exposure and skin cancer

E. Dependent variable is skin cancer and independent variable is sun exposure