A large medical center’s oncology program reported an increased number of cases
ID: 70594 • 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
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.
Does this study have a disease status variable?
No
Yes, lifestyle
Yes, cancer
Yes, sex of patient
Insufficient information to answer the question
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
A disease status variable means a variable which is categorical or qualitative and can have the value as yes or no
here the disease status variable could be the yes or no answer of having the cancer or not therefore, the answer is yes, cancer, option C
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