EPID EXAM 1: MEASURE OF DISEASE OCCURRENCE
EXAMS ALL ANSWERS 100% CORRECT VERIFIED BEST
GRADED A+ FOR SUCCESS
What are the measures of disease occurence?
Prevalence
Risk
Rates
Odds
Counts
Three components of Prevalence, Risks, and Rates:
1. Numerator (people with the outcome, "cases")
2. Denominator (total population or study sample)
3. Time period (always include the time!)
Incident cases
New cases, individuals who change in outcome status in a specified
period of time
**Calculating risk, rates
Prevalent cases
ALL cases, snapshot of all individuals with outcome
**Calculating prevalence
How much disease is there at one moment, or one period, of time?
Prevalence (P) = # of prevalent cases / # of total population
How much disease over time, and I can track everyone in my population
or study?
EXAMS ALL ANSWERS 100% CORRECT VERIFIED BEST
GRADED A+ FOR SUCCESS
What are the measures of disease occurence?
Prevalence
Risk
Rates
Odds
Counts
Three components of Prevalence, Risks, and Rates:
1. Numerator (people with the outcome, "cases")
2. Denominator (total population or study sample)
3. Time period (always include the time!)
Incident cases
New cases, individuals who change in outcome status in a specified
period of time
**Calculating risk, rates
Prevalent cases
ALL cases, snapshot of all individuals with outcome
**Calculating prevalence
How much disease is there at one moment, or one period, of time?
Prevalence (P) = # of prevalent cases / # of total population
How much disease over time, and I can track everyone in my population
or study?