A public health resident is reviewing various surveillance and registry reports from different medical institutions. For each provided study methodology or data collection scenario, select the specific epidemiological metric being calculated.
- A hospital infection control committee calculates the number of new central line-associated bloodstream infections per 1,000 catheter-days over a one-year period.Incidence rate
- A municipal health department determines the proportion of residents in a district who currently have active asthma during a survey conducted in a single week.Point prevalence
- Epidemiologists investigate a gastroenteritis outbreak and calculate the proportion of attendees who ate a specific contaminated food and subsequently developed symptoms.Attack rate
- A national cancer registry reports the proportion of patients diagnosed with advanced melanoma who die specifically from this cancer within five years of their initial diagnosis.Case fatality rate
Cevap
The scenarios correctly correspond to Incidence rate for the catheter-days metric, Point prevalence for the single-week survey, Attack rate for the foodborne outbreak, and Case fatality rate for the cancer death registry.
Each specific epidemiological metric matches its corresponding scenario based on the numerator and denominator used: incidence rate requires person-time, point prevalence captures a snapshot in time, attack rate applies to acute outbreaks, and case fatality rate measures lethality among diagnosed cases.
Adım Adım Çözüm
Anahtar Kavram
Understanding and differentiating core measures of disease frequency based on study design, timeframes, and specific denominators.