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Open Access Research article

Validation of the 10-item Chinese perceived stress scale in elderly service workers: one-factor versus two-factor structure

Siu-man Ng

Author Affiliations

Department of Social Work and Social Administration, The University of Hong Kong, Hong Kong SAR, China

BMC Psychology 2013, 1:9  doi:10.1186/2050-7283-1-9

Published: 19 June 2013

Abstract

Background

Despite its popularity, the psychometric properties of the 10-item Chinese Perceived Stress Scale (CPSS-10) in working adults are yet to be evaluated.

Methods

This study examined CPSS-10 in elderly service workers through a questionnaire survey. The sample was randomly split into two for exploratory (EFA) and confirmatory factor analysis (CFA).

Results

A high response rate (93%) was achieved, resulting in 992 completed questionnaires. EFA with the first split sample favored a two-factor over a one-factor solution. The second factor had eigenvalue 2.00 and provided 19.95% explained variance. In CFA with the second split sample, the two-factor structure showed satisfactory goodness-of-fit (CFI = 0.93, RMSEA = 0.06) while the one-factor structure showed poor data fit (CFI = 0.62, RMSEA = 0.14). Further analyses on the two-factor structure revealed that the whole scale and two subscales had acceptable internal consistency (Cronbach’s alphas = 0.67 to 0.78). The total score was positively associated with perceived workload and burnout (r = 0.17 to 0.48), but negatively with work engagement (r = −0.13 to −0.30). In contrary to previous studies, a low inter-factor correlation (r = −0.08) was revealed.

Conclusions

CPSS-10 showed a stable two-factor structure with satisfactory internal consistency and construct validity.

Keywords:
Stress; Measure; Scale validation; Psychometrics