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Chapter: 1 / Q: 91
In a cohort study concerning the relationship between the use of exogenous estrogens and the subsequent risk of breast cancer, a sample of 1000 premenopausal women were followed for 8 years. The results are presented in the table above. The absolute risk of breast cancer among women who did rece
Chapter: 1 / Q: 92
In a cohort study concerning the relationship between the use of exogenous estrogens and the subsequent risk of breast cancer, a sample of 1000 premenopausal women were followed for 8 years. The results are presented in the table above. The relative risk associated with therapy in this study is
Chapter: 1 / Q: 93
Following a large group of cigarette smokers for a period of 10 years to determine the occurrence of chronic obstructive pulmonary disease (COP, coronary heart disease, and various forms of lung cancer would be an example of
Chapter: 1 / Q: 94
A nutritional research team followed serum levels of vitamin B12 and folic acid in 125 children for five years to determine the association between cyanocobalamin deficiency and the subsequent risk of developing megaloblastic anemia. The results were as follows:
Chapter: 1 / Q: 95
If, in one of the groups of premature infants, the maximum value for hexosaminidase A was substituted with a much higher value, which of the given values remains unchanged:
Chapter: 1 / Q: 96
In a cohort study involving the relationship betwe status and the subsequent risk of developing pneumocystis carinii pneumonia, 50 HIV-positive volunteers were followed for 6 months: 100 for 1 year, 100 for 3 years, and 200 for 5 years. The number of person-years of observation in this study w
Chapter: 1 / Q: 97
The smoking history of pregnant women is taken in the antenatal period and correlated with the birth weight at the time of delivery. To find an association between them would be an example of:
Chapter: 1 / Q: 98
In a study of 500 cases of a disease and 500 controls, the suspected etiological factor is found in 400 of the cases and 100 of the controls. The absolute risk (incidence of disease in persons with the factor is:
Chapter: 1 / Q: 99
Prophylactic administration of vitamin K in breast fed babies is an example of:
Chapter: 1 / Q: 100
In a bulk of hundred children out of whom 28 are immunized 2 of them get measles simultaneously. Subsequently14 get measles. Assuming the efficacy of the vaccine to be 100%, what is the secondary attack rate?
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