BIOS601 AGENDA: Wednesday September 23
[updated September 21, 2007]
Lecture: Intro to Epidemiology and Measures of Occurrence - 2
- déjà
- Definitions of Epidemiology
- States vs. Events
- Population
An aggregate of people, defined by membership-defining...
- event -> "cohort" ( closed population i.e. closed for exit)
or
- state - for duration of state -> Open population (open for exit) / dynamic / turnover
- Prevalence (of a state)
- Population-time
- Incidence ( new events in members "at risk" for the event )
- Incidence density (momentary or average over a span of time)
- Hazard (momentary, but more commonly used w.r.t a closed population)
- Force of morbidity/mortality / Intensity
- Cumulative Incidence (over a span of cohort time), and associated terms
- Risk
- its complement: Survival proportion
- New
- (more on) Mathematical link between Incidence Density and Cumulative Incidence
- Relationship between Prevalence, Incidence, and Duration in a State
- Length-biased sampling
- Population Pyramids
Pyramids for Canada, the provinces and territories from 1901 to 2001
- Lexis Diagram - 2 time axes; Breslow&Day section 2.2
- Current Life Tables and Cohort Life Tables
- Concepts/Definitions in early chapters in Clayton & Hills
- Links to Resources pages
1 |
2
Lab
-
Individual (oral) reports on the features of a survey of your choosing..
(choose one from those marked with 3 asterisks (***) on
this page)
for the survey that you choose, tell us (one sentence each) ...
- the target population
- the type of sample, and how the sampled units were selected
- the response/participation rate
- what was measured, and how
- one interesting statistic from the survey
- (NEW) one example each of a reported prevalence, incidence rate, and cumulative incidence/risk
(if the survey doesn't have examples of all 3, not to worry)
- info / tips / resources on computing in R and/or SAS.
e.g.
http://www.ats.ucla.edu/stat/ offers intros to all the
major statistical computing packages
Intro to R (from the NL) -- there are many such Intro's on the web.
Reference Cards for R: 1page | 4 pages
The Little SAS Book: A Primer, Third Edition, available as an
eBook
Statistics and Statistical Graphics Resources (Psychology Dept, York University ... extensive links )