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Week 15, Biostats

by: A Jones

Week 15, Biostats Heal 395

A Jones
C of C
GPA 3.5

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This note is for one week. ------------------------------- I have completed study guides for Exam 1 and 2!!... Entitled: ***Biostatistics Exam 1 Full ***Biostatistics Exam 2 Full I d...
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This 1 page Class Notes was uploaded by A Jones on Monday September 19, 2016. The Class Notes belongs to Heal 395 at College of Charleston taught by Hart in Fall 2016. Since its upload, it has received 4 views. For similar materials see Biostatistics in Public Health at College of Charleston.

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Date Created: 09/19/16
9/19/2016 Exam 1 | Evernote Web 1. Determine reference population 2. Calculate the rate of an event for each age category  rate of blacks with diabetes for each age range 3. Expected cases= (each age­specific sample rate) * (# of people in the reference population) 4. Add Expected cases 5. Determine the total reference population size (for all age categories) 6. Divide the total “Expected Counts” by the total reference population size (THE RESULT IS YOUR OVERALL ADJUSTED RATE) 7. Calculate the overall crude rate for the reference population 8. Multiply the “Overall Adjusted Rate” and the crude population rate by the appropriate rate base Indirect Standardization: 7 steps 1. Determine which group is the “reference population” (hint: the larger one) and which groups are the “samples” or “comparison” groups (hint: the smaller ones) 2. Calculate the rate of an event for each age category for the reference population 3. Expected Cases­ Multiply each age­specific rate for the reference population by the number of people in each age category for each comparison population, round to nearest whole number. 4. Total Expected Cases for each Comparison Population­ Add up the “Expected Cases” for each comparison group 5. Total Observed Cases for each Comparison Population­ Add up the number of events for all age categories for each comparison group 6. Overall Adjusted Rate: Divide total Expected Cases by the total Observed Cases/Events for each comparison group Calculate the overall crude rate for the reference population 7. Determine the Rate Difference for each comparison group for interpretation How do we choose which rates to use? Crude no comparison b/c we are looking at one group/population Specific rate is confounded by another variable such a age, state, or any other demographic variables Adjusted rate  impacted by another variable it's just for comparison purposes and as a result, it does not accurately depict the experience of that population   Direct: if all data is present Indirect: missing data or unusually small sample sizes Probability ­ Events 2 types of Probability Subjective: personal conception of the likelihood of an event based on previous observation or experience Objective: likelihood of an event based on repeated experiments/measurements 2  theories of probability Bayesian: Probability statistics that involve prior beliefs or data as part of the calculations­c67d­4931­b221­67fe1a313fd8&b=3e793d12­ce29­48b5­aeeb­12b02ed6bc73&5/7=4&sh=1&sds=5&


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