| Question 1 of 254.0 PointsAsbestos exposure has been associated with:A. pesticides from the organochloride familyB. asbestosis, malignant mesothelioma, and lung cancerC. metallic compoundsD. vinyl chlorideReset Selection |
| Question 2 of 254.0 PointsA sentinel health event refers to:A. the correlation between daily mortality and increased air pollutionB. the nuclear plant accident in Chernobyl, Ukraine.C. a case of unnecessary workplace disease that serves as a warning signal.D. none of the aboveReset Selection |
| Question 3 of 254.0 PointsThe healthy worker effect refers to the observation that:A. exercise on the job causes workers to become healthy and gain years of life.B. healthy persons are more likely to gain employment than unhealthy persons.C. unemployed persons tend to have lower mortality than employed personsD. none of the aboveReset Selection |
| Question 4 of 254.0 PointsA situation in which the combined effect of several exposures is greater than the sum of the individual effectsA. thresholdB. latencyC. synergismD. none of the aboveReset Selection |
| Question 5 of 254.0 PointsThe time period between initial exposure and a measurable responseA. thresholdB. latencyC. synergismD. none of the aboveReset Selection |
| Question 6 of 254.0 PointsIt has been suggested that occupational exposure to benzene in the petroleum industry increases the risk of developing leukemia. The levels of benzene to which workers in this industry have been exposed were high from 1940 to 1970, but since 1970 have been significantly reduced. What kind of study design, using petroleum workers, would provide the most useful information on whether benzene affects incidence rates of leukemia in this industry? (You may assume that records of individual worker assignments to jobs involving benzene exposure have been maintained by the industry.)A. Retrospective cohortB. Case-controlC. Cross-sectionalD. ExperimentalReset Selection |
| Question 7 of 254.0 PointsIn case-control studies evaluating the epidemiological evidence for genetic factors, family recall bias:A. is the special situation where cases are more likely to be informed about their family history than are controlsB. never occursC. does not matterD. only occurs in the controlsReset Selection |
| Question 8 of 254.0 PointsThe situation in which only a single copy of an altered gene located on an non-sex chromosome is sufficient to cause an increased risk of disease refers to:A. autosomal recessiveB. recessiveC. autosomal dominantD. none of the aboveReset Selection |
| Question 9 of 254.0 PointsThe situation in which a specific allele at the marker locus is strongly associated with the mutant allele is known as:A. linkage disequilibriumB. single nucleotide polymorphism (SNP)C. polymorphicD. none of the aboveReset Selection |
| Question 10 of 254.0 PointsPsychosocial epidemiology includes the following factors:A. psychologicalB. behavioralC. socialD. all of the above |
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