Purpose

The Short Musculoskeletal Function Assessment (SMFA) questionnaire can be used to evaluate physical functioning in patients with traumatic injuries. It is not known what change in score reflects a meaningful change to patients. The aim was to determine minimal important change (MIC) values of the subscales (0–100) of the Dutch SMFA-NL in a sample of patients with a broad range of injuries.

Methods

Patients between 18 and 65 years of age completed the SMFA-NL and the Global Rating of Effect (GRE) questions at 6-week and 12-month post-injury. Anchor-based MIC values were calculated using univariable logistic regression analyses.

Results

A total of 225 patients were included (response rate 67%). The MIC value of the Upper Extremity Dysfunction (UED) subscale was 8 points, with a misclassification rate of 43%. The Lower Extremity Dysfunction subscale MIC value was 14 points, with a misclassification rate of 29%. The MIC value of the Problems with Daily Activities subscale was 25 points, with a misclassification rate of 33%. The MIC value of the Mental and Emotional Problems (MEP) subscale was 7 points, with a misclassification rate 37%.

Conclusion

MIC values of the SMFA-NL were determined. The MIC values aid interpreting whether a change in physical functioning can be considered clinically important. Due to the considerable rates of misclassification, the MIC values of the UED and MEP subscales should be used with caution.

中文翻译：

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创伤患者身体机能的最小重要变化：一项使用短肌骨骼功能评估的研究。

目的

简短的骨骼肌肉功能评估（SMFA）问卷可用于评估创伤患者的身体功能。尚不清楚分数的变化反映了患者的有意义的变化。目的是确定在遭受广泛伤害的患者样本中，荷兰SMFA-NL分量表（0-100）的最小重要变化（MIC）值最小。

方法

18至65岁的患者在受伤后6周和12个月内完成了SMFA-NL和整体疗效评分（GRE）问题。使用单变量逻辑回归分析计算基于锚的MIC值。

结果

总共包括225名患者（有效率67％）。上肢功能障碍（UED）分量表的MIC值为8分，错误分类率为43％。该下肢功能障碍量表MIC值是14点，29％错误率。日常活动问题量表的MIC值为25分，错误分类率为33％。精神和情绪问题（MEP）分量表的MIC值为7分，错误分类率为37％。

结论

确定了SMFA-NL的MIC值。MIC值有助于解释物理功能的变化在临床上是否被认为是重要的。由于错误分类的可能性很高，因此应谨慎使用UED和MEP子量表的MIC值。