2x2 Table
odds ratio, relative risk
What can you calculate using the 2x2 table?
.05
What does the P-value need to be less then to trust your findings?
a*d/ b*c
What is the formula for odds ratio?
a/(a+b)/ c/(c+d)
What is the formula for relative risk?
a/ a+b
What is the formula for the attack rate of the exposed?
c/ c+d
What is the formula for the attack rate of the unexposed?
Odds Ratio
used in case-control study
Relative Risk
used in cohort study
P-value
the measure of how confident you are that your findings are correct; determines whether the results of the study can be used
attack rate
the rate that a group experienced an outcome or illness equal to the number sick divided by the total in that group
2x2 table
A table which has two columns and rows for people with or without exposure and with or without disease; shows the number of people with each characteristic