1. What is the difference between the reliability and validity of a measurement? The validity of a measure is the extent to which differences in scores on the instrument reflect true differences among ...

The tool's total composite severity percentage showed excellent inter-rater reliability (ICC of 0.99) and strong convergent validity with NSAA and PUL 2.0 scores. DVA 2.0 can detect clinically ...

Objective: To evaluate the reliability and validity of a brief physical activity assessment tool suitable for doctors to use to identify inactive patients in the primary care setting. Methods: ...