Relationship Between Clinical Outcome Measures and Parent Proxy Reports of Health-Related Quality of Life in Ambulatory Children With Duchenne Muscular Dystrophy

In Duchenne muscular dystrophy, data directly linking changes in clinical outcome measures to patient-perceived well-being are lacking. This study evaluated the relationship between clinical outcome measures used in clinical trials of ambulatory Duchenne muscular dystrophy (Vignos functional grade, quantitative knee extension strength, timed functional performance measures, and gait velocity) and 2 health-related quality of life measures—the Pediatric Outcomes Data Collection Instrument and Pediatric Quality of Life Inventory—in 52 ambulatory Duchenne muscular dystrophy subjects and 36 controls. Those with the disease showed significant decrements in parent proxy-reported health-related quality of life measures versus controls across all domains. The Pediatric Outcomes Data Collection Instrument transfers/basic mobility and sports/ physical function and the Pediatric Quality of Life Inventory physical functioning domains had significant associations with age (and hence disease progression) and traditional...