Pneumoconiosis of coal workers black lung is corre

Question 1 of 5

Pneumoconiosis of coal workers (black lung) is correctly characterized by which of the following statements?

A. Development appears to be independent of duration of exposure to coal dust B. Only nonsmokers are covered under the Black Lung Act C. It is easy to differentiate from silicosis on chest radiographs D. None of the above

Correct Answer: D

Rationale: A (dose-dependent), B (all covered), C (hard to distinguish), D (functional loss) false.

Question 2 of 5

Which of the following features characterizes families in which spouse abuse occurs?

A. Husbands of battered women have less education than those of nonbattered women B. Women who were abused as children are more likely to be abused by their spouses C. Women whose mothers suffered abuse are unlikely to be abused by their own husbands D. Men who batter women are prosecuted in 25 percent of cases

Correct Answer: B

Rationale: Childhood abuse increases risk; others false.

Question 3 of 5

Epidemiology, as defined in this lesson, would include which of the following activities? (Choose one wrong answer)

A. Describing the demographic characteristics of persons with acute aflatoxin poisoning in District A B. Prescribing an antibiotic to treat a patient with community-acquired methicillin-resistant Staphylococcus aureus infection C. Comparing the family history, amount of exercise, and eating habits of those with and without newly diagnosed diabetes D. Recommending that a restaurant be closed after implicating it as the source of a hepatitis A outbreak

Correct Answer: B

Rationale: Epidemiology involves describing disease patterns (A) and analyzing risk factors (C). Prescribing antibiotics (B) is a clinical task, not an epidemiological one.

Question 4 of 5

A cohort study differs from a case-control study in that: (Choose one wrong answer)

A. Subjects are enrolled or categorized on the basis of their exposure status in a cohort study but not in a case-control study B. Subjects are asked about their exposure status in a cohort study but not in a case-control study C. Cohort studies require many years to conduct, but case-control studies do not D. Cohort studies are conducted to investigate chronic diseases, case-control studies are used for infectious diseases

Correct Answer: B

Rationale: Cohort studies start with exposure (A), unlike case-control’s outcome focus. Both ask about exposure (B is wrong), and C and D are not universally true.

Question 5 of 5

Which of the following are considered measures of spread? (Choose one wrong answer)

A. Interquartile range B. Percentile C. Range D. Standard deviation

Correct Answer: B

Rationale: IQR (A), range (C), and standard deviation (D) measure spread. Percentiles (B) indicate position, not spread.

Pneumoconiosis of coal workers (black lung) is correctly characterized by which of the following statements?

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