测量一致性：踏板加速时间测量跨和内部评级的可靠性

Annals of vascular surgery. Brief reports and innovations Pub Date : 2025-08-06 DOI:10.1016/j.avsurg.2025.100400

Odette Hart , Philip Allan , Bridget August , Grant Abbott , Catherine Evans , Manar Khashram

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引用次数: 0

摘要

目的踏板加速时间（PAT）是一种新型的无创下肢血流灌注评估工具。然而，评估者之间和内部的重测信度尚未得到检验。这项初步研究的目的是评估PAT测量的内部和内部可靠性。方法10例糖尿病足和/或慢性肢体威胁性缺血患者，由三名训练有素的超声医师在单个肢体的三条足动脉上进行三次重复的PAT测量。评估者之间的信度是通过患者、评估者和重复对方差的贡献来评估的。受试者内变异系数（CV）量化受试者内信度。用类内相关系数（ICC）对评分者和重复措施的影响进行了总结。结果评分者间信度对方差的贡献很小，仅为≤0.4%，其中≥88.1%的方差是由患者的可变性驱动的。用CV评估的评分者内信度在10.8% - 12.2%之间。通过ICC评估的评分者和重复测量者的综合效果为0.88-0.99（信度从良到优）。结论：本初步研究表明，经过训练的超声医师可以可靠地测量PAT，并具有良好到优异的内部和内部可靠性。

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Measuring consistency: The reliability of pedal acceleration time measurements across and within raters

Objectives

Pedal acceleration time (PAT) is a novel non-invasive lower limb perfusion assessment tool. However, the test-retest reliability between and within raters has not been examined. The aim of this pilot study was to assess the inter- and intra-rater reliability of PAT measurements.

Methods

Ten patients with diabetic foot and/or chronic limb threatening ischaemia underwent three repeated PAT measurements across three pedal arteries in a single limb by three trained sonographers. Inter-rater reliability was assessed as the contribution to variance by patients, raters, and replicates. Intra-rater reliability was quantified by the within-subject coefficient of variation (CV). The effects of raters and repeat measures was summarised using the intraclass correlation coefficient (ICC).

Results

Inter-rater reliability showed little contribution to variance at only ≤0.4 %, with ≥88.1 % of variance being that driven by patient variability. Intra-rater reliability as assessed by CV ranged between 10.8 %-12.2 %. The combined effect of raters and repeat measures assessed by ICC was 0.88–0.99 (good-to-excellent reliability).