The critieria for validity of a screening test are-
Ref: Parks 23rd edition pg 138 Validity has 2 components : sensitivity and specificity. Validity (Accuracy) The term validity refers to what extend the test accurately measures what it purpos to measure. Accuracy refers to the closeness with which measured values agree with "true" values.
Accuracy
Predictability
Sensitivity & specificity
Cost effectiveness
Screening