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Validation of the pediatric stroke outcome measure for classifying overall neurological deficit
Pediatric Research ( IF 3.6 ) Pub Date : 2020-03-16 , DOI: 10.1038/s41390-020-0842-5
Mahmoud Slim 1 , Christine K Fox 2 , Sharon Friefeld 3 , Nomazulu Dlamini 1 , Robyn Westmacott 4 , Mahendranath Moharir 1 , Daune MacGregor 1 , Gabrielle deVeber 1 ,
Affiliation  

Background The pediatric stroke outcome measure (PSOM) is a standardized, disease-specific outcome measure. We aimed to validate the overall classification of neurological deficit severity using PSOM. Methods We identified 367 neonates/children with arterial ischemic stroke (AIS) (Derivation Cohort). We analyzed the PSOM subscales (scored as 0 [no deficit], 0.5 [minimal/mild deficit; normal function], 1 [moderate deficit; slowing function], or 2 [severe deficit; missing function]) to derive severity levels using latent class analysis (LCA). We validated a severity classification scheme (PSOM-SCS) in: (a) children who had Pediatric Evaluation of Disability Inventory (PEDI; n = 63) and/or the Pediatric Quality-of-Life Inventory (PedsQL; n = 97) scored; and (b) an external cohort (AIS; n = 102) with concurrently scored modified Rankin Scale (mRS), King’s Outcome Scale for Childhood Head-Injury (KOSCHI) and PSOM. Results Within the Derivation Cohort, LCA identified three severity levels: “normal/mild,” “moderate,” and “severe” (83.7%, 13.3%, and 3%, respectively). We developed severity classification based on PSOM subscale scores: “normal/mild”—normal function in all domains or slowing in one domain, “moderate”—slowing in ≥2 domains or missing function in one domain, and “severe”—missing function in ≥2 domains or slowing in ≥1 plus missing in one domain. PEDI and PedsQL both differed significantly across the severity groups. PSOM-SCS displayed high concordance with mRS (agreement coefficient [AC2] = 0.88) and KOSCHI (AC2 = 0.79). Conclusion The PSOM-SCS constitutes a valid tool for classifying overall neurological severity emphasizing function and encompassing the full range of severity in pediatric stroke. Impact Arithmetic summing of the PSOM subscales scores to assess severity classification is inadequate. The prior severity classification using PSOM overestimates poor outcomes. Three distinct severity profiles using PSOM subscales are identified. The PSOM-SCS is in moderate to excellent agreement with other disability measures. PSOM-SCS offers a valid tool for classifying the overall neurological deficit severity.

中文翻译:

验证小儿卒中结果测量对整体神经功能缺损进行分类

背景 儿科卒中结局指标 (PSOM) 是一种标准化的、针对特定疾病的结局指标。我们旨在使用 PSOM 验证神经功能缺损严重程度的总体分类。方法 我们确定了 367 名患有动脉缺血性卒中 (AIS) 的新生儿/儿童(派生队列)。我们分析了 PSOM 分量表(评分为 0 [无缺陷]、0.5 [最小/轻度缺陷;正常功能]、1 [中度缺陷;功能减慢]或 2 [严重缺陷;功能缺失])使用潜在类分析(LCA)。我们在以下方面验证了严重程度分类方案 (PSOM-SCS):(a) 儿科残疾评估量表 (PEDI;n = 63) 和/或儿科生活质量量表 (PedsQL;n = 97) 评分的儿童; (b) 一个外部队列(AIS;n = 102),同时对改良的 Rankin 量表 (mRS) 进行评分,King's Outcome Scale for Childhood Head-Injury (KOSCHI) 和 PSOM。结果 在衍生队列中,LCA 确定了三个严重程度级别:“正常/轻度”、“中度”和“严重”(分别为 83.7%、13.3% 和 3%)。我们根据 PSOM 分量表评分制定了严重程度分类:“正常/轻度”——所有领域的功能正常或某一领域的功能减慢,“中度”——≥2 个领域的功能减退或一个领域的功能缺失,以及“严重”——功能缺失在 ≥2 个域中或在 ≥1 个域中减慢加上在一个域中缺失。PEDI 和 PedsQL 在严重性组中都存在显着差异。PSOM-SCS 显示出与 mRS(一致系数 [AC2] = 0.88)和 KOSCHI(AC2 = 0.79)的高度一致性。结论 PSOM-SCS 构成了一个有效的工具,用于对强调功能的整体神经学严重程度进行分类并涵盖小儿卒中的全部严重程度。影响评估严重性分类的 PSOM 分量表分数的算术求和是不够的。使用 PSOM 的先前严重性分类高估了不良结果。使用 PSOM 子量表确定了三个不同的严重性配置文件。PSOM-SCS 与其他残疾措施具有中等至极好的一致性。PSOM-SCS 提供了一种有效的工具来对整体神经功能缺损严重程度进行分类。使用 PSOM 子量表确定了三个不同的严重性配置文件。PSOM-SCS 与其他残疾措施具有中等至极好的一致性。PSOM-SCS 提供了一种有效的工具来对整体神经功能缺损严重程度进行分类。使用 PSOM 子量表确定了三个不同的严重性配置文件。PSOM-SCS 与其他残疾措施具有中等至极好的一致性。PSOM-SCS 提供了一种有效的工具来对整体神经功能缺损严重程度进行分类。
更新日期:2020-03-16
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