Research and Innovation Group in Health Care and Nursing, Hanze University Groningen, University of Applied Sciences, P.O. Box 3109, 9701 DC, Groningen, The Netherlands.
J Occup Rehabil. 2009 Sep;19(3):238-44. doi: 10.1007/s10926-009-9179-y. Epub 2009 May 15.
The Work Well Functional Capacity Evaluation (WW FCE) is a two-day performance based test consisting of several work-related activities. Three lifting and carrying test items may be performed on both days. The objective of this study was to assess the need for repeated testing of these items in subjects with early osteoarthritis of the hip and/or the knee and to analyze sources of variation between the 2 days of measurement.
A standardized WW FCE protocol was applied, including repeated testing of lifting low, lifting overhead and carrying. Differences and associations between the 2 days were calculated using paired samples t-tests, intraclass correlation coefficients (ICC) and limits of agreement (LoA). Possible sources of individual variation between the 2 days were identified by Wilcoxon signed ranks tests. Pearson correlation coefficients were calculated for differences in performances between days and differences in possible sources of variation between days.
Seventy-nine subjects participated in this study, their mean (SD) age was 56.6 (4.8) years, median (min-max) WOMAC (Western Ontario and McMaster Universities) index scores for pain, stiffness and physical function were 5 (0-17), 3 (0-7) and 14 (0-49), respectively. Median (min-max) SF36 physical function was 75 (5-95), and SF36 pain score was 67 (12-76). Mean performance differences ranged from -0.2 to -0.8 kg (P > 0.05). ICC's ranged from 0.75 (lifting overhead) to 0.88 (lifting low). LoA were: lifting low 8.0 kg; lifting overhead 6.5 kg; carrying 9.0 kg. Pearson's correlations were low and non-significant.
All three tests show acceptable two-day consistency. WW FCE testing on two consecutive days is not necessary for groups of subjects with early osteoarthritis. Individual sources of variation could not be identified.
Work Well 功能能力评估（WW FCE）是一项为期两天的基于绩效的测试，包括多项与工作相关的活动。其中三个举重和搬运测试项目可在两天内进行。本研究的目的是评估在髋部和/或膝关节早期骨关节炎患者中重复测试这些项目的必要性，并分析测量 2 天之间的变异来源。
应用标准化的 WW FCE 方案，包括对低举、高举和搬运进行重复测试。使用配对样本 t 检验、组内相关系数（ICC）和一致性界限（LoA）计算 2 天之间的差异和相关性。通过 Wilcoxon 符号秩检验确定 2 天之间个体变异的可能来源。计算了 2 天之间的性能差异以及 2 天之间可能的变异来源之间的差异的 Pearson 相关系数。
共有 79 名受试者参加了这项研究，他们的平均（SD）年龄为 56.6（4.8）岁，中位数（最小-最大）WOMAC（安大略西部和麦克马斯特大学）疼痛、僵硬和身体功能指数分别为 5（0-17）、3（0-7）和 14（0-49）。SF36 身体功能的中位数（最小-最大）为 75（5-95），SF36 疼痛评分为 67（12-76）。平均性能差异范围为-0.2 至-0.8 公斤（P > 0.05）。ICC 范围为 0.75（高举）至 0.88（低举）。LoA 分别为：低举 8.0 公斤；高举 6.5 公斤；搬运 9.0 公斤。Pearson 相关系数较低且无统计学意义。
所有三项测试均表现出良好的两天一致性。对于早期骨关节炎患者群体，不需要在连续两天进行 WW FCE 测试。个体变异的来源无法确定。
