NR 503 Week 8 Final Exam Student Consult Questions with Rationale Chapters 2-4, 5-6

Chapters 2-4 Question: Which of the following is a condition which may occur during the incubation period? Question: Chicken pox is a highly communicable disease. It may … transmitted by direct contact with a person infected with the varicella-zoster virus (VZV). The typical incubation time is between 10 to 20 days. A boy started school 2 weeks after showing symptoms of chicken pox including mild fever, skin rash, and fluid-filled blisters. One month after the boy returned to school, none of his classmates … infected by VZV. The main reason was: Question: Which of the following is characteristic of a single-exposure, common-vehicle outbreak? Chapters 5-6 Question: In a community-based hypertension testing program called HT-Aware, the detection level for high blood pressure is set at 140 mmHg for systolic blood pressure. A separate testing program called HT-Warning in the same community sets the level at 130 mmHg for high systolic blood pressure. Which statements are likely to be true? Question: A school nurse examined a population of 1,000 children in an attempt to detect nearsightedness. The prevalence of myopia in this population is known to be 15%. The sensitivity of the examination is 60% and its specificity is 80%. All children labeled as “positive” (i.e., suspected of having myopia) by the school nurse are sent for examination by an optometrist. The sensitivity of the optometrist’s examination is 98% and its specificity is 90%. How many children are labeled “positive” by the school nurse? Question: What is the positive predictive value (PPV) of the school nurse’s exam?