學院 |
醫學院 |
系所 |
職能治療學系 |
題名 |
Reliability and validity of a vertical numerical rating scale supplemented with a faces rating scale in measuring fatigue after stroke |
作者 |
Chuang, L-L., Lin, K-C., Hsu, A-L., Wu, C-Y.*, Chang, K-C, Li, Y-C., & Chen, Y-L. |
期刊名稱 |
Health and Quality of Life Outcomes |
發表日期 |
2015 |
著作性質 |
原著 |
語文 |
英文 |
關鍵字 |
Fatigue;
Reliability; Numerical Rating Scale; Faces Rating Scale; Stroke |
摘要 |
Background Poststroke fatigue is a persistent and
distressing symptom among stroke survivors. In this study, we investigated
the reliability and validity of a vertical numerical rating scale
supplemented with a faces rating scale (NRS-FRS) in measuring poststroke
fatigue. Methods The fatigue intensity of 106 individuals
with stroke was measured twice, 1 week apart, using a vertical NRS-FRS to
measure test-retest reliability. The intraclass correlation coefficient, a
relative reliability index, was calculated to examine the degree of
consistency and agreement between the 2 test occasions. Absolute reliability
indices, including the standard error of measurement, minimal detectable
change, and Bland-Altman limits of agreement, were used to quantify
measurement errors and determine systematic biases of the 2 test occasions.
We also administered the vertical NRS concurrently as a comparator measure
for assessing fatigue in 50 consecutive patients with stroke who were
recruited later in the study period. The Spearman rank correlation
coefficient (ρ) was used to examine the concurrent validity of the NRS-FRS.
Discriminant validity was assessed by means of receiver operating
characteristic curves, sensitivity, and specificity. Results The intraclass correlation coefficient was
0.95 for the NRS-FRS. The standard error of measurement and the minimal
detectable change at the 95% confidence interval of the NRS-FRS were 0.50 and
1.39, respectively. The Bland-Altman analyses showed no significant
systematic bias between the repeated measurements. A narrow range of the
limits of agreement was shown on the Bland-Altman plot, indicating the
NRS-FRS had high stability and low variation between the 2 test occasions.
The correlations between the NRS-FRS and NRS were good at test (ρ = 0.85) and
retest (ρ = 0.84). Compared with the NRS cutoff value of ≥1, sensitivity with
the NRS-FRS at test and retest was 94% and 92% and specificity was 79% and
90%, respectively. Conclusions This study provides further evidence of the reliability and validity of the NRS-FRS in measuring fatigue intensity in patients with stroke. The NRS-FRS had high sensitivity and specificity. The NRS-FRS may be a reliable and valid measure for clinicians and researchers to assess fatigue and determine whether a real change has occurred in groups and at the individual level of patients with stroke. |