B.
Cross-sectional study.
✓
D.
Randomized controlled trial.
✓
A.
Increase law enforcement presence in the neighborhood.
✓
B.
Conduct a rapid epidemiological investigation to identify the substances involved, common sources, and affected demographics.
✓
C.
Blame the individuals for drug use.
✓
D.
Wait for the number of deaths to stabilize.
✓
B.
Effectiveness (or pragmatic) trial (Phase IV).
✓
C.
Pre-clinical research.
✓
C.
Positive Predictive Value.
✓
D.
Negative Predictive Value (NPV).
✓
A.
Dismiss it as random chance.
✓
B.
Conduct an environmental epidemiology investigation to identify potential occupational or environmental exposures.
✓
C.
Blame the local hospital for misdiagnosis.
✓
D.
Issue a general warning about cancer.
✓
D.
Cumulative Incidence.
✓
A.
Pre-clinical studies.
✓
A.
Pre-clinical studies.
✓
A.
Many false negative results.
✓
B.
Many false positive results, leading to unnecessary anxiety and follow-up tests.
✓
C.
Accurate diagnosis immediately.
✓
D.
No need for further testing.
✓
A.
Advise people to avoid all restaurants.
✓
B.
Issue an immediate public health warning about the specific restaurant and advise affected individuals to seek medical care.
✓
C.
Wait for the restaurant to voluntarily close.
✓
D.
Only investigate individual cases.
✓
B.
Specific mortality rate.
✓
D.
Years of Potential Life Lost (YPLL).
✓
A.
The study was too small.
✓
B.
The temporal sequence between lack of sleep and poor performance cannot be established.
✓
C.
Students were not randomized.
✓
D.
The study was too expensive.
✓
A.
Disease prevalence in the population.
✓
A.
Immediately close the operating rooms indefinitely.
✓
B.
Initiate an infection control investigation, implement enhanced hygiene protocols, and identify common exposures among affected patients.
✓
C.
Inform only the patients who developed infections.
✓
D.
Blame individual surgeons for poor technique.
✓
