Pashmdarfard Marzieh, Amini Malek, Hejazi-Shirmard Mahnaz, Zamiran Sara, Baranello Giovanni, Akbarzadeh Baghban Alireza, Kalantari Minoo
Department of Occupational Therapy, School of Rehabilitation, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
Rehabilitation Research Center, Department of Occupational Therapy, School of Rehabilitation Sciences, Iran University of Medical Sciences, Tehran, Iran.
Iran J Child Neurol. 2025 Jun 25;19(3):45-51. doi: 10.22037/ijcn.v19i3.47283. eCollection 2025 Summer.
This study aimed to translate and develop the Persian version of The Visual Function Classification System (P-VFCS) while assessing its validity and reliability.
MATERIALS & METHODS: The VFCS was created to classify visual function among individuals with Cerebral Palsy (CP). Until this point, no such classification system was available in Iran. Therefore, the VFCS underwent translation into Persian, with the original developer approving the back-translation. A panel of ten occupational therapists and ten parents evaluated the face validity. The Persian version of VFCS (P-VFCS) was administered to 156 participants with CP, aged 1 to 19 years (age range: 2 to 18 years; mean age: 9.1 years; standard deviation: 6.32 years). Inter-rater reliability was measured among 156 parents and four occupational therapists. Test-retest reliability was evaluated throughout two to four weeks with 77 parents and two occupational therapists.
The inter-rater reliability of the weighted kappa between OTs and parents for the P-VFCS was 0.88 (95% confidence interval [CI], 0.62 to 0.89). The weighted kappa test-retest reliability for the P-VFCS was 0.91 (95% CI: 0.93 to 1.00) for occupational therapists and 0.90 (95% CI: 0.89 to 1.00) for parents. The face validity assessment revealed that 80% of parents of individuals with CP (8 out of 10) and 100% of occupational therapists (10 out of 10) found the P-VFCS suitable in translation and face validity quality.
The findings indicated that the P-VFCS is a reliable and valid classification system for classifying visual functions in individuals with CP within clinical settings.
本研究旨在翻译并开发视觉功能分类系统的波斯语版本（P-VFCS），同时评估其有效性和可靠性。
VFCS旨在对脑瘫（CP）患者的视觉功能进行分类。在此之前，伊朗尚无此类分类系统。因此，VFCS被翻译成波斯语，并经原开发者批准进行回译。由十名职业治疗师和十名家长组成的小组对其表面效度进行了评估。VFCS的波斯语版本（P-VFCS）应用于156名年龄在1至19岁之间的CP患者（年龄范围：2至18岁；平均年龄：9.1岁；标准差：6.32岁）。在156名家长和四名职业治疗师之间测量了评分者间信度。在两到四周的时间内，对77名家长和两名职业治疗师进行了重测信度评估。
职业治疗师和家长对P-VFCS的加权kappa评分者间信度为0.88（95%置信区间[CI]，0.62至0.89）。职业治疗师对P-VFCS的加权kappa重测信度为0.91（95%CI：0.93至1.00），家长为0.90（95%CI：0.89至1.00）。表面效度评估显示，80%的CP患者家长（10名中的8名）和100%的职业治疗师（10名中的10名）认为P-VFCS在翻译和表面效度质量方面是合适的。
研究结果表明，P-VFCS是一种可靠且有效的分类系统，可用于在临床环境中对CP患者的视觉功能进行分类。
