Reliability and Validity of the Timed Floor to Stand Test-Natural in School-Aged Children

Purpose: To establish reliability for the Timed Floor to Stand-Natural (TFTS-N) test as a stand-alone measure for schoolchildren with typical development (TD) in preparation for normative data collection. Methods: Five physical therapists working in schools standardized testing procedures for a "natural" pace version of the TFTS. Time data were collected using a repeated-measures design. Results: Twenty-two students with TD (8 years 7 months to 12 years 7 months; X = 10 years, SD = 1.13) completed the TFTS-N in 6.27 (SD = 0.30) to 8.45 (SD = 0.68) seconds. Intraclass correlation coefficients (ICCs) (3,1) ranged from 0.713 to 0.800 for intrarater reliability and was 0.988 for interrater reliability. The ICC (3,3) was 0.871 for test-retest reliability. Conclusion: The TFTS-N has high intra-, inter-, and test-retest reliability. TFTS-N has face validity as the task frequently occurs in school settings. The test procedures are reliable for trained physical therapists to establish individual baseline measures of schoolchildren with TD.