A large medical center’s oncology program reported an increased number of cases
ID: 3004794 • Letter: A
Question
A large medical center’s oncology program reported an increased number of cases of pancreatic cancer during a certain month. The hospital’s epidemiologist decided to research the problem. Tumor registry records were searched to identify all cases of pancreatic cancer during a five-year period; cancer patients were matched with patients treated for other diseases during the same five-year period. All subjects in the study were questioned about lifestyle factors including alcohol, tea, and coffee consumption. The resulting data are as follows:
DATA
Cancer Patients
Other Patients
Men
Women
Men
Women
LIFESTYLE VARIABLE
Alcohol
185
120
270
260
Tea Drinking
140
110
230
225
Coffee Drinking
190
140
270
240
Note: Total number of male cancer patients = 200.
Total number of female cancer patients = 150.
Total number of male patients (other diseases) = 300.
Total number of female patients (other diseases) = 300.
4. Please calculate the measure of association associated with alcohol drinking in men and describe your results in words?
5. Please calculate the measure of association associated with alcohol drinking in women and describe your results in words?
6. Please calculate the measure of association associated with tea drinking in men and describe your results in words?
7. Please calculate the measure of association associated with tea drinking in women and describe your results in words?
8. Please calculate the measure of association associated with alcohol drinking in men and describe your results in words?
9. Please calculate the measure of association associated with alcohol drinking in women and describe your results in words?
DATA
Cancer Patients
Other Patients
Men
Women
Men
Women
LIFESTYLE VARIABLE
Alcohol
185
120
270
260
Tea Drinking
140
110
230
225
Coffee Drinking
190
140
270
240
Explanation / Answer
4. measure of assosciation is calculated through odd ratio.
odd of cancer among alcohol consuming man=185/15=x
odd of other disease among alcohol consuming man=270/30=9=y
odd ratio=x/y=1.37
odd ratio is greater than 1, it implies alcohol consume rhas higher chance of cancer then any other disease.
5.
odd of cancer among alcohol consuming women=120/30=4=x
odd of other disease among alcohol consuming man=260/40=y
odd ratio=x/y=0.61
odd ratio is less than 1, it implies alcohol consume has higher chance of other disease than cancer among women.
all parts do it like this..
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