美国国家航空航天局任务负荷指数作为衡量新生儿、儿科和成人重症监护护士整体工作量的指标。
The NASA Task Load Index as a measure of overall workload among neonatal, paediatric and adult intensive care nurses.
机构信息
Cincinnati Children's Hospital Medical Center, Department of Patient Services, 3333 Burnet Avenue, ML 11016, Cincinnati, OH 45229, USA; The Ohio State University College of Nursing, Columbus, OH, USA. Electronic address: https://twitter.com/htubbscooley_RN.
Cincinnati Children's Hospital Medical Center, Division of Behavioral Medicine and Clinical Psychology, Cincinnati, OH, USA.
出版信息
Intensive Crit Care Nurs. 2018 Jun;46:64-69. doi: 10.1016/j.iccn.2018.01.004. Epub 2018 Feb 12.
INTRODUCTION
The NASA Task Load Index (NASA-TLX) is a subjective workload assessment scale developed for use in aviation and increasingly applied to healthcare. The scale purports to measure overall workload as a single variable calculated by summing responses to six items. Since no data address the validity of this scoring approach in health care, we evaluated the single factor structure of the NASA-TLX as a measure of overall workload among intenisive care nurses.
METHODS
Confirmatory factor analysis of data from two studies of nurse workload in neonatal, paediatric, and adult intensive care units. Study 1 data were obtained from 136 nurses in one neonatal intensive care unit. Study 2 data were collected from 300 nurses in 17 adult, paediatric and neonatal units. Nurses rated their workload using the NASA-TLX's paper version.
RESULTS
A single factor model testing whether all six items measured a single overall workload variable fit least well (RMSEA = 0.14; CFI = 0.91; TLI = 0.85). A second model that specified two items as outcomes of overall workload had acceptable fit (RMSEA = 0.08; CFI = 0.97; TLI = 0.95) while a third model of four items fit best (RMSEA = 0.06; CFI > 0.99; TLI = 0.99).
CONCLUSION
A summed score from four of six NASA-TLX items appears to most reliably measure a single overall workload variable among intensive care nurses.
简介
美国国家航空航天局任务负荷指数（NASA-TLX）是一种主观的工作负荷评估量表，专为航空应用开发，并越来越多地应用于医疗保健领域。该量表旨在通过对六个项目的回答进行求和来测量整体工作负荷。由于没有数据表明这种评分方法在医疗保健中的有效性，因此我们评估了 NASA-TLX 的单因素结构，作为衡量重症监护护士整体工作负荷的指标。
方法
对两项新生儿、儿科和成人重症监护护士工作负荷研究的数据进行验证性因素分析。研究 1 的数据来自一个新生儿重症监护病房的 136 名护士。研究 2 的数据来自 17 个成人、儿科和新生儿病房的 300 名护士。护士使用 NASA-TLX 的纸质版本对其工作负荷进行评分。
结果
一个单一因素模型（即所有六个项目都测量单一的整体工作负荷变量）的拟合效果最差（RMSEA=0.14；CFI=0.91；TLI=0.85）。第二个模型指定了两个项目作为整体工作负荷的结果，具有可接受的拟合度（RMSEA=0.08；CFI=0.97；TLI=0.95），而第三个包含四个项目的模型拟合度最佳（RMSEA=0.06；CFI>0.99；TLI=0.99）。
结论
在重症监护护士中，六个 NASA-TLX 项目中的四个项目的总和得分似乎最能可靠地测量单一的整体工作负荷变量。
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