Editorial Commentary: Patient-Reported Outcomes Measurement Information System (PROMIS) Has Decreased Disease-Specific Responsiveness More Than Legacy Outcome Measures, But PROMIS and Legacy Measures Do Correlate: You Can't Have Your Cake and Eat It Too.

A better understanding of hip-preservation patients lies in our ability to analyze and collect data. Collecting the appropriate outcome measures is required to improve treatments, personalize health care, and drive policy. Current research suggests legacy measures and Patient-Reported Outcomes Measurement Information System (PROMIS) measures can be used in data collection, but which measures are best? PROMIS computer-adaptive tests are an attractive outcome measure source because they allow for low-burden data capture with reduced completion times and limited floor and ceiling effects. PROMIS provides numerous reliable, sensitive, and domain-specific measurements capturing a patient's health outcomes. PROMIS has been shown to correlate with hip and other legacy outcome measures, but because PROMIS is more general than some legacy measures, it may be less responsive. PROMIS measures are applicable across a wide spectrum of health measures for our patients, including hip femoroacetabular impingement, but should not replace the legacy measure of the International Hip Outcome Tool 12. However, PROMIS should still be measured because it may allow greater comparison to studies of other conditions resulting in diminished reporting bias.