What is the life expectancy for people who have SMA?
SMA is a genetic disease characterized by progressive muscle weakening and loss. Because the muscles controlling breathing are affected by the disease, SMA can cause premature death. Life expectancy of SMA tends to vary by SMA type, which is generally associated with age of onset of symptoms. Children diagnosed with SMA Type I may survive for up to two years or longer, depending on their individual strength. Children with moderate to mild forms of SMA (SMA Types II and III) generally live into adulthood and could have normal life expectancy. Good multidisciplinary care, including physical therapy, occupational therapy, respiratory therapy, and nutritional support, can improve quality and length of life for people with SMA and is recommended. Planning for medical emergencies is also strongly suggested. Please see the Family Guide to the Consensus Statement for Standard of Care in Spinal Muscular Atrophy for more information.
