Treating acute stroke with drugs that minimize cell death could result in a median decrease in disability of 30%. Treatment with stem cell transplants could result in a median decrease in disability of 25%.
Shekelle, Paul G., Eduardo Ortiz, Sydne J. Newberry, Michael W. Rich, Shannon L. Rhodes, Robert H. Brook, and Dana P. Goldman. Identifying Potential Health Care Innovations for the Elderly of the Future: Health and costs of the future elderly. Health Aff. 2005; 24(2). https://www.ncbi.nlm.nih.gov/pubmed/16186152