Term
What does the pvalue measure? 

Definition
A pvalue is a measure of the probability that an observed difference could have occurred just by random chance
The lower the pvalue, the greater the statistical difference
Pvalue can be used as an alternative to or in addition to preselected confidence levels for hypothesis testing 


Term
The specificity of a test indicates what? 

Definition
also called the True negative rate
the proportion of people without the disease who will have negative results
specificity of a test refers to how well a test identifies patients who do not have a disease 


Term
The sensitivity of a test measures what? 

Definition
also called the true positive rate
the proportion of people with the disease who will have a positive result
A highly sensitive test can be useful for ruling out a disease if a person has a negative result 


Term
Explain the difference between sensitivity and specificity 

Definition
Sensitivity: the ability of a test to correctly identify patients with a disease
Specificity: the ability of a test to correctly identify people without the disease
True positive: the person has the disease and the test is positive
True negative: the person does not have the disease and the test is negative



Term
Is specificity more important than sensitivity? 

Definition
The more sensitive a test, the less likely an individual with a negative test will have the disease, and thus the greater the negative predictive value
The more specific the test, the less likely an individual with a positive test will be free from disease and the greater the positive predictive value 


Term
Clinical sensitivity vs specificity 

Definition
 Clinical sensitivity
 %age of positive patients testing positive
 Clinical specificity
 %age of negative patients testing negative


