Reading...
Play button
Play button
Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
6 Cards in this Set
- Front
- Back
|
Reasons for an association between a factor and a disease
|
bias in measurement
bias in sampling confounding factor chance causal transposition b/t cause and effect |
|
|
Ecological Studies
|
-compare same pop over time, or two diff pops at same time.
-comparisons are at group level -susceptible to "ecological fallacy" |
|
|
Ecological fallacy
|
the nature of specific individuals is judged by a study of a population (may not apply to individuals in that pop completely)
|
|
|
Cross-Sectional Studies
|
typically surveys
sample should be representative can produce est of prevalence uncertainty of sep cause from effect = limitation can produce RR measures |
|
|
Case-Control studies
|
-sample of cases
-sample of ppl from same pop without control group -odds ratio and relative risk est. -Sampling bias and measurement bias |
|
|
Cohort Studies
|
-assembly of cohort and follow-up over time
-can directly measure risk and RR -limited utility for very rare diseases or very long latencies |
