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10 Cards in this Set
- Front
- Back
Indirect Age Adjustment |
Comparison of observed vs. expected events ignored to eliminate the effect of any age difference between the population number of event for each age-specific stratum are not available |
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Standardized Mortality Ratio |
(Observed number of deaths / Expected number of Deaths) * 100 |
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Indirect Age-Adjustment Steps |
Step1-identify observed events in the population of interest Step2-identify age-specific event rates for known population of comparison Step3-Apply age specific event rates from PC to age specific strata of PI to obtain expected number of deaths for each category Step4-Sum the expected number of events for the PI Step5-find the SMR |
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Disadvantage of Indirect Adjustment |
-Information is lost when summary measures are used
-The absolute and relative magnitudes of the standardized rate will depend on the standard used -standardized rate are fictitious - they do not estimate any true parameter |
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5-Year Survival Rate |
proportion of persons in a specified group alive at the beginning of the 5 years who survived to the end of the the 5 years
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Leap Time Bias |
give biases based on time of diagnosis
the idea that earlier detection is has resulted longer survival times but just because you know someone has the disease earlier it doesn't mean that the medication is helped extend life |
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Assumptions made in using life table |
-no changed have occurred in treatment or survivorship over calendar
-for each interval the probability of an event is uniform throughout the interval -those lost to follow-up experience the same survivorship as those who are followed |
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d |
d |
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Relative Survival Rate |
observed survival rate / expected survival rate
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d |
d |