WHAT IS THE RELIABILITY AND VALIDITY FOR EACH INDICATOR?
Reliability relates to the reproducibility of a measure, validity judges whether a measurement actually measures the phenomenon it purports to measure. There are several different types of statistical validity measures, and there are also important considerations of practical and operational validity. A difference between two numbers may have statistical significance, but have no practical difference. A chosen indicator could be a clinically acceptable process, but if the measurement of that indicator is unreliable or invalid, the indicator has no value as a measure. Descriptive statistics and controls set in place when we abstract or collect data in another way, help define reliability: validity is derived from the guidelines and supporting literature. CONFIDENCE INTERVALS Confidence intervals are frequently used to convey a sense of the levels of precision attributable to sampling. ABCs are based on actual performance observed on a pre-determined “universe” of patients rather than a
