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Nursing QUESTION #9152
Question 1
In epidemiology, the Attack Rate formula is:
Which formula correctly represents the attack rate?
  • \\frac{\\text{New cases in a period}}{\\text{Population at start of period}} \\times 100
  • \\frac{\\text{Ill persons among exposed}}{\\text{Total exposed persons}} \\times 100✔️
  • \\frac{\\text{Total cases}}{\\text{Total population}} \\times 1000
  • \\frac{\\text{Deaths due to disease}}{\\text{Total cases of disease}} \\times 100
Correct Answer Explanation

The Attack Rate is used during outbreaks/epidemics to measure the proportion of exposed individuals who develop the disease:

\\text{Attack Rate} = \\frac{\\text{Number of ill persons among exposed}}{\\text{Total number of exposed persons}} \\times 100

  • Option 1 describes Incidence Rate
  • Option 3 describes Prevalence Rate
  • Option 4 describes Case Fatality Rate (CFR)

Understanding attack rates is essential during disease outbreak management — a core Head Nurse responsibility in community settings.