1
Q
Selection bias
A
- unrepresentative of the population being studied
- group comparison is not like for like
2
Q
Information bias
A
- differential recall
- differential observation
- differential measurement
- differential classification
3
Q
Epidemiology
A
- the study of the distribution and determinants of health related states or events in specified populations, and the application of this study to the control of health problems
Assumes - disease doesn’t occur at random
- disease has causal and preventable factors that can be identified through systematic variation
4
Q
Case-Effect relationships
A
Exposures do not need to be necessary or sufficient to be important causes
