Subject
infant; children; Pediatrics; Rehabilitation; motor; female; male; assessments; childhood/physiopathology; humans; spinal muscular atrophies of; child development; childhood/diagnosis; functional motor scale; observer variation; performance; physical therapy; physical therapy specialty/standards; reproducibility of results; skills/physiology; specialty/instrumentation; video recording; tone and motor problems; SMA1; tool development; scale development; TIMP
Description
Purpose: This study examined the reliability and validity of the Test of Infant Motor Performance Screening Items (TIMPSI) in infants with type I spinal muscular atrophy (SMA). Methods: After training, 12 evaluators scored 4 videos of infants with type I SMA to assess interrater reliability. Intrarater and test-retest reliability was further assessed for 9 evaluators during a SMA type I clinical trial, with 9 evaluators testing a total of 38 infants twice. Relatedness of the TIMPSI score to ability to reach and ventilatory support was also examined. Results: Excellent interrater video score reliability was noted (intraclass correlation coefficient, 0.97-0.98). Intrarater reliability was excellent (intraclass correlation coefficient, 0.91-0.98) and test-retest reliability ranged from r = 0.82 to r = 0.95. The TIMPSI score was related to the ability to reach (P <= .05). Conclusion: The TIMPSI can reliably be used to assess motor function in infants with type I SMA. In addition, the TIMPSI scores are related to the ability to reach, an important functional skill in children with type I SMA. (Pediatr Phys Ther 2013;25:140-148)