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The number of patients who have a negative test and do not have the disease (true negatives) divided by the number of patients who do not have the disease is
So‘rovnoma
  •   Sensitivity
  •   Specificity
154 ta ovoz


The number of patients with a positive test who have a disease (true positives) divided by all patients who have the disease is
So‘rovnoma
  •   Sensitivity
  •   Specificity
148 ta ovoz




What type of study is at the pinnacle of the hierarchy of medical evidence?
So‘rovnoma
  •   Meta analysis
  •   Systematic review
  •   Randomized controlled trial
  •   Cohort study
  •   Case control study
111 ta ovoz


Observational studies


Observational studies


Incidence Vs Prevalence


Development of an effective vaccine for disease causes ___ in incidence and ____in prevalence
So‘rovnoma
  •   Decrease, no change
  •   No change, decrease
  •   Decrease, decrease
  •   No change, no change
108 ta ovoz


Development of an effective treatment for disease causes ____ in incidence and ___ in prevalence
So‘rovnoma
  •   No change, decrease
  •   Decrease, decrease
  •   No change, no change
  •   Decrease, no change
101 ta ovoz


If people with a chronic disease live longer, there is ___ in incidence and ___ in prevalence.
So‘rovnoma
  •   Increase, increase
  •   Increase, no change
  •   No change, increase
  •   No change, no change
  •   No change, decrease
101 ta ovoz


Prevalence can be further defined as being "point" or "period."

Point prevalence refers to the proportion of individuals with a condition at a specified point in time, while Period prevalence refers to the proportion of individuals with a condition during a specified interval (eg, a year)


Incidence & Prevalence

Statistics describing rates of disease or events

Incidence — Incidence represents the number of new events that have occurred in a specific time interval divided by the population at risk at the beginning of the time interval. 

Prevalence — Prevalence refers to the number of individuals with a given disease at a given point in time divided by the population at risk at that point in time.

14 ta oxirgi post ko‘rsatilgan.