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01-06-2019 | Insomnia

Nonrestorative sleep scale: reliable and valid for the Chinese population

Authors: S. Li, D. Y. T. Fong, J. Y. H. Wong, K. Wilkinson, C. Shapiro, E. P. H. Choi, B. McPherson, C. L. K. Lam, M. S. M. Ip

Published in: Quality of Life Research | Issue 6/2019

Abstract

Purpose

To conduct a linguistic and psychometric evaluation of a Chinese version of the Nonrestorative Sleep Scale (NRSS).

Methods

The Chinese NRSS was created from a standard forward–backward translation and trialed on 10 Chinese adults. Telephone interviews were then conducted with 100 adults, who completed the Chinese NRSS, the Pittsburgh Sleep Quality Index (PSQI), the Athens Insomnia Scale (AIS), the Center for Epidemiological Studies Depression Scale (CES-D), and the Toronto Hospital Alertness Test (THAT). A household survey was conducted with 20 subjects, followed by a confirmatory factor analysis (CFA), and a bifactor model was developed to evaluate the reliability and validity of the NRSS.

Results

The bifactor model had the root mean square error of approximation (RMSEA), standardized root mean square residual (SRMR), and comparative fit index (CFI) of 0.06, 0.06, and 0.97, respectively. Convergent validity was shown from the moderate associations with PSQI (r = − 0.66, P < 0.01), AIS (r = − 0.65, P < 0.01), CES-D (r = − 0.54, P < 0.01), and THAT (r = 0.68, P < 0.01). The coefficient omega (0.92), omega hierarchical (0.81), factor determinacy (0.93), H value (0.91), explained common variance (0.63), and percentage of uncontaminated correlations (0.80) derived from the bifactor CFA supported the essential unidimensionality of NRSS.

Conclusions

The Chinese NRSS is a valid and reliable essential unidimensional tool for the assessment of nonrestorative sleep in the Chinese population.

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Title: Nonrestorative sleep scale: reliable and valid for the Chinese population
Authors: S. Li
D. Y. T. Fong
J. Y. H. Wong
K. Wilkinson
C. Shapiro
E. P. H. Choi
B. McPherson
C. L. K. Lam
M. S. M. Ip
Publication date: 01-06-2019
Publisher: Springer International Publishing
Keyword: Insomnia
Published in: Quality of Life Research / Issue 6/2019
Print ISSN: 0962-9343
Electronic ISSN: 1573-2649
DOI: https://doi.org/10.1007/s11136-019-02134-8

Keynote webinar | Spotlight on medication adherence

Springer Medicine

Nonrestorative sleep scale: reliable and valid for the Chinese population

Abstract

Purpose

Methods

Results

Conclusions

Keynote webinar | Spotlight on medication adherence

Springer Medicine

Abstract

Purpose

Methods

Results

Conclusions

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