A 34-year-old woman presents to the emergency department in July with fever (38.5°C), cough, and myalgias for 2 days. Vital signs: BP 118/76, HR 92, RR 18, SpO2 98% on room air. A rapid influenza assay is performed. Chest X-ray shows no infiltrates. She denies recent travel. The test's sensitivity and specificity remain constant year-round. Compared to testing during peak winter influenza season, which parameter is most likely to be higher when this assay is used during summer months?
- A)Negative predictive valueGABARITO
- B)Positive predictive value
- C)False-positive rate
- D)Sensitivity
- E)Specificity
Explicação
Negative predictive value increases when disease prevalence decreases. During the summer, influenza is much less common, so a negative test is more likely to be a true negative. Sensitivity, specificity, and false-positive rate do not change if the intrinsic p... Ver explicação completa e trilha adaptativa →