Cook CE, Garcia AN, Wright A, et al. - The present study was attempted to ascertain the construct validity of the tool, specifically structural validity; examine the criterion validity of the tool, specifically concurrent validity against proxy measures of pain, function, and quality of life and predictive validity of each item to proxy measures of disability; and reliability of the tool, specifically internal consistency. Researchers collected data from the Quality Outcomes Database Spine Registry. They included a sum of 57,199 participants who had undergone primary or revision lumbar spine surgeries were included. The research lends value to a burgeoning repository of evidence that implies the Oswestry Disability Index is a useful tool for capturing outcomes in clinical practice. Its continued use in clinical practice is recommended.