Lecture 2 Flashcards
What is YLD?
Years lived with disability.
What is YLL?
Years of life lost.
What is DALY?
Combine premature deaths and loss of healthy life resulting from illness or disability = number of years lost to disease.
What is ideal health?
Where the entire population lives to an advanced age, free of disease and disability.
What is morbidity?
Any departure from physiological and psychological wellbeing.
Compression of morbidity
Aims to slow the progression from chronic disease to morbidity - this means that people can have a good quality of life and contribute to society for longer.
Why measure disease occurrence in populations?
To describe how often disease (or outcome) occurs in a population.
Prevalence: strengths and limitations
Limitations:
- affected by the duration of the disease.
- doesn’t tell us about the development of the disease.
Incidence proportion: strengths and limitations
Limitations:
- assumes a closed population.
- highly dependent on the time.
What is person time at risk?
The sum of everyone in the populations time at risk
Incidence rate: strengths and limitations
Limitations:
- can be difficult to calculate.
Descriptive epidemiology
Person, place, time - who, what, when, where.
It is observational.
