11,000 people in an area around a large nuclear power plant were followed for 7 years, or until the development of any cancer of the blood. 30 cases were identified over the 7 year study period.What is the risk of developing the outcome of interest: cancer of the blood?.27 or 27%.0027 or .27%366.02 or 2%

We identify 50 patients with cancer, review their medical records, and determine that 10 of them were exposed to a risk factor.We then identify a comparison group of 50 cancer-free individuals, review their medical records, and determine that 2 were exposed to the risk factor. Which of the following statements are correct?Group of answer choicesThis is a retrospective studyThe risk factor causes cancer.Patients with the risk factor are 6 times more likely to develop cancer than patients without the risk factor (where likely is interpreted as a probability)This is a prospective studyThe odds of developing cancer for patients with the risk factor are 6 times the odds of developing cancer for those without the risk factor

Recall the definitions of relative and excess risk from your lectures. One of the cases given in the paper "Diagnostic radiography in pregnancy: Risks and reality" had a case where 792 children died from leukemia, in a population of 275,000. If the normal incidence is 150/100,000, what are the relative and excess risks in this situation?Group of answer choices0.52, and 9/31252.88, and 1/200,0001.92, and 69/50,0001.94, and 31/22000

Which one of the following is a result of high exposure of radiation?Question 4Answera.Leg fractureb.Loss of white blood cellsc.Tooth decayd.Hair loss

Once the study population has been defined, the denominator of a risk is affected by which of the following? (You must choose all that apply to receive credit for this question; no partial credit will be awarded.)1 pointloss to follow-upmigration who is at risk of developing the health outcomedeathsbirths

Which of the following does not increase risk for breast cancer?Question 4Answera.High number of birthsb.High breast densityc.Family history of ovarian cancerd.Older age