Peng Kanglong, Liu Guixiang, Wang Jinggang, Chen Turong
Shenzhen Children's Hospital, Shenzhen, China.
Clin Pediatr (Phila). 2025 May;64(4):524-537. doi: 10.1177/00099228241274295. Epub 2024 Aug 25.
Our study utilized Rasch Analysis to examine the psychometric properties of 61-items fine motor function measure (FMFM) in children with cerebral palsy (CP). Partial credit model (PCM) was utilized to test the reliability and validity of FMFM. The response pattern of this samples displayed acceptable fitness to PCM. The analysis results supported the assumption of 1-dimensionality of FMFM. Disordered category thresholds were found in 30 items. Differential item functioning (DIF) was detected in 23 items. Participants with different CP subtypes in different age groups may perform in differently responses patterns. The Rasch analysis produces reliable evidence to support the clinical application of FMFM. Some items may produce inaccurate measurements originated from category structures. Difference in age groups and symptom topography may be associated with variation in fine motor ability among children with CP and leading to unnecessary assessment bias. Hence, FMFM items need modifications to calibrate the former item formulation.
我们的研究采用拉施分析来检验61项精细运动功能测量量表（FMFM）在脑瘫（CP）儿童中的心理测量特性。使用部分计分模型（PCM）来测试FMFM的信度和效度。该样本的反应模式显示出对PCM可接受的拟合度。分析结果支持FMFM一维性的假设。在30个项目中发现了无序类别阈值。在23个项目中检测到项目功能差异（DIF）。不同年龄组中不同CP亚型的参与者可能表现出不同的反应模式。拉施分析产生了可靠的证据来支持FMFM的临床应用。一些项目可能会因类别结构而产生不准确的测量结果。年龄组和症状形态的差异可能与CP儿童精细运动能力的变化有关，并导致不必要的评估偏差。因此，FMFM项目需要修改以校准原有的项目表述。
