Introduction To Edipemiological Investigation Flashcards
Define epidemiology
The study of the distribution and determinants of health related states and the application of this study to control the diseases and other health related problems
What can be used to study distribution
Surveillance and descriptive studies
What can be used to study determinants
Analytical studies
Define statistics
The collection, presentation, description and analysis of data which are measurable in numerical form
What is prevalence
The proportion of people with a disease not a rate
How do you calculate incidence rate
New events / person x time in years
What is prevalence equal to
Incidence x duration of disease
What are person-years
The sum of the total time everybody is followed up in a study
What is true if the p value is less than 0.05
The data is inconsistent with the hypothesis therefore reject it
The observations are statistically significant
What is the 95% confidence interval
The range within which we can be 95% certain that the true value really lies
What is true about the observed difference from the null hypothesis if the null hypothesis is consistent with the observed data
Any observed difference from the null hypothesis is due to chance
What is the p value if the null hypothesis lies outside the 95% CI
Less than 0.05
