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The proportion of the study population at each functional independence grade at admission and discharge from inpatient rehabilitation. Disability grades ranged from grade 1 (need for total assistance in multiple physical self care tasks) to grade 7 (full functional independence). A, TBI (n = 6297); B, quadriplegia (n = 946); C, paraplegia (n = 1244); D, other injuries (n = 5311).
