Class Notes (837,023)
United States (324,846)
PUBHLTH 1 (54)
Zuzana Bic (19)
Lecture 7

PUBHLTH 1 Lecture 7: Lecture 7&8 4/17/17-4/19/17

3 Pages
Unlock Document

Public Health
Zuzana Bic

Chapter 7 Statistics: Making Sense of Uncertainty Statistics is The numbers that describe the health of the population The science used to interpret these numbers The Uncertainty of Science Most science is of a probable nature Science is ongoing studies may contradict each other The science of statistics can quantify the degree of uncertainty Probability estimated chance of particular situation for occurring The probable is what usually happens Power of a Study The probability of finding an effect, if there is in fact an effect Large numbers confer power more participants in order to have statistical significance Statistics of Screening Tests Examples of screening: Mammography for breast cancer HIV tests Newborn screening Sensitivity vs. specificity Sensitivity how accurately a test identifies people who have the the disease (true positives) Specificity how accurately a test identifies people who dont have the disease (true negatives) False positive vs. False negative Rates Relate the raw numbers to size of population Birth rates Mortality rates Crude rates Adjusted rates E.g. age adjusted Group specific rates E.g. gender specific Other Calculated Statistics Life expectancy public healths goal not only to increase life expectancy, but also the quality of life Risk Assessment and Risk Perception For wellknown risks, can be calculated from historical data For poorly understood risks, must make many assumptions Risk perception involves psychological factors CostBenefit Analysis Cost is easier to calculate than benefit; e.g. big company employers dont like to implement public health policies because of the shortterm costs
More Less

Related notes for PUBHLTH 1

Log In


Join OneClass

Access over 10 million pages of study
documents for 1.3 million courses.

Sign up

Join to view


By registering, I agree to the Terms and Privacy Policies
Already have an account?
Just a few more details

So we can recommend you notes for your school.

Reset Password

Please enter below the email address you registered with and we will send you a link to reset your password.

Add your courses

Get notes from the top students in your class.