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Published on: September 27, 2010
Reliability and Cross-Cultural Validation of the Turkish Version of the Visual Function Classification System (VFCS)
H Adiguzel Tat1, P Gunel Karadeniz2, U Apaydin3
1Faculty of Health Sciences, Department of Physiotherapy and Rehabilitation, Kahramanmaras Sutcu Imam University, Kahramanmaras, Turkey.
Purpose:
This correlational study aimed to determine the reliability and validity of the Turkish version of the Visual Function Classification System (VFCS) for children with CP.
Method:
Two physiotherapists and caregivers (n = 56) applied the VFCS (n = 120) two times at a 15-day interval. Physiotherapists' classifications were compared for interrater reliability. Same physiotherapists and caregivers' classifications' were compared for intrarater reliability. Expanded & Revised Gross Motor Function Classification System (GMFCS E&R), Manual Ability Classification System (MACS), and Communication Function Classification System (CFCS) were used for assessing validity of the culturally adapted VFCS.
Results:
The interrater reliability between physiotherapists was excellent (ICC = 0.974, ICC = 0.988), while interrater reliability between the first physiotherapist and caregivers was good (ICC = 0.866, ICC = 0.893). The intrarater reliability was excellent (ICC = 0.971, ICC = 0.996, ICC = 0.984). A correlation was detected between the VFCS and the GMFCS E&R, MACS, and CFCS levels (r = 0.415, p < .001, r = 0.450, p < .001, r = 0.491, p < .001).
Conclusion:
The findings of this study demonstrate the utility, compatibility and reliability of the Turkish version of the VFCS.
Trial Registration Number:
NCT05102955.
