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Lecture

HLTB15H3 Lecture Notes - Null Hypothesis, Age Adjustment, Mortality Rate

3 Pages
144 Views
Winter 2014

Department
Health Studies
Course Code
HLTB15H3
Professor
Lianne Tripp

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Lecture 5 – HLTB15
- Incidence rate is over disease free person years.
- Person-years are the total number of grey bars for disease free.
-Standard Mortality ratio = Observed number of deaths per year/ expected number
of deaths per year (expressed as a percent!)
-Cause-specific mortality = number of deaths due to a particular disease /
population at risk (always whole population at risk) x 100
-Case-fatality = number of deaths due to particular disease / number of illness
associated with particular disease X 100
Age Standardization
- Age standardization is an important predictor of mortality.
- With age comes higher prevalence with neurological disorders.
- Direct age adjustment: applying the rates of the population to a standard population
You need to have a standard population for a reference point (data
sets that have been compiled for specific age cohorts).
Yields the number of cases that would be expected if the age-specific
rates in the standard population were true for the study period.
(Equation) Direct Age Adjustment = total number of expected
numbers of deaths / population by the population at risk for the
standard population (population of specific age group you are
looking at)
- We can use age standardization for mortality, incidence, and prevalence.
- Another way of standardizing is adding BOTH populations.
- Direct Method of Age Standardization
(PROBABLY WON’T BE ON THE EXAM… TOO HARD) Expected
deaths = age specific death rates per age category X standard
population (both populations together)
(PROBABLY WON’T BE ON THE EXAM… TOO HARD) Total
expected deaths = added specific death rates per age category
- Indirect method of age standardization

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Description
Lecture 5 – HLTB15 - Incidence rate is over disease free person years. - Person-years are the total number of grey bars for disease free. - Standard Mortality ratio = Observed number of deaths per year/ expected number of deaths per year (expressed as a percent!) - Cause-specific mortality = number of deaths due to a particular disease / population at risk (always whole population at risk) x 100 - Case-fatality = number of deaths due to particular disease / number of illness associated with particular disease X 100 Age Standardization - Age standardization is an important predictor of mortality. - With age comes higher prevalence with neurological disorders. - Direct age adjustment: applying the rates of the population to a standard population  You need to have a standard population for a reference point (data sets that have been compiled for specific age cohorts).  Yields the number of cases that would be expected if the age-specific rates in the standard population were true for the study period.  (Equation) Direct Age Adjustment = total number of expected numbers of deaths / population by the population at risk for the standard population (population of specific age group you are looking at) - We can use age standardization for mortality, incidence, and prevalence. - Another way of standardizing is adding BOTH populations. - Direct Method of Age Standardization  (PROBABLY WON’T BE ON THE EXAM… TOO HARD) Expected deaths = age specific death rates per age category X standard population (both populations together)  (PROBABLY W
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