Development and validity of a work functioning impairment scale based on the Rasch model among Japanese workers

The aim of the study was to investigate test-retest reliability and construct validity of the World Mental Health Japan (WMHJ) version of WHO-HPQ according the COSMIN standard. We conducted two consecutive surveys of 102 full-time employees recruited through an Internet survey company in Japan, with a two-week interval in 2018. We calculated Pearson's correlation (r) of measures of the WHO-HPQ with other presenteeism scales (SPS, WFun, and perceived relative presenteeism), health and psychosocial job conditions. We tested the test-retest reliability (intraclass correlation, ICC) among those who reported no change of job performance during the follow-up. Among 92 (90%) respondents, the absolute presenteeism significantly correlated with WFun and perceived relative presenteeism (r= -0.341 and -0.343, respectively, p<0.01) and psychological distress (r=-0.247, p=0.018). The absolute/relative absenteeism did not significantly correlate with the covariates. The test-retest reliability over a two-week period was high for the WHO-HPQ absolute presenteeism (ICC, 0.73), while those for absolute/relative absenteeism measures were moderate. The study found an adequate level of test-retest reliability, but limited support for the construct validity of the absolute presenteeism measure of the WMHJ version of the WHO-HPQ. Further research is needed to investigate the construct validity of the WHO-HPQ measures in a larger sample.

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“…The SPS 11) and WFun 13) were measured in the survey at T1. The SPS was translated into Japanese and already validated 35) .…”

Section: Other Presenteeism Scalesmentioning

confidence: 99%

Construct validity and test-retest reliability of the World Mental Health Japan version of the World Health Organization Health and Work Performance Questionnaire Short Version: a preliminary study

et al. 2020

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“…Furthermore, the Rasch model assumes no sample dependence for test items of measures produced by the model, a property called “specific objectivity” . In fact, we examined this property in the development process and found that estimates of item difficulty were consistent between subgroups of different sex, age, income, and job type, as well as different companies . Nonetheless, to further verify comparability with Japanese workers, future studies should conduct a survey targeting foreigners who work for Japanese companies.…”

Section: Discussionmentioning

confidence: 90%

“…The Japanese, Chinese, and English versions of WFun were examined using internet surveys. For the Japanese version, the internet survey was conducted in our previous study for the original development of WFun; the data were reanalyzed for the purposes of the present study.…”

Section: Methodsmentioning

confidence: 99%

“…The original Japanese version of WFun was examined using an internet survey that targeted 1000 registered Japanese monitors, as described previously . Briefly, we enlisted a commercial testing company to perform an internet test user study.…”

Section: Methodsmentioning

confidence: 99%

“…The work functioning impairment scale (WFun) was developed to measure the degree of work functioning impairment in Japanese workers based on the Rasch model . That is, WFun endeavors to express the level of worker health problems in terms of the extent to which a worker experiences reduced functioning at work as a consequence of these problems.…”

Section: Introductionmentioning

confidence: 99%

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Cross‐cultural validation of the work functioning impairment scale (WFun) among Japanese, English, and Chinese versions using Rasch analysis

Fujino

Liu

Chimed‐Ochir

et al. 2019

Journal of Occupational Health

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Objectives The work functioning impairment scale (WFun) was developed to measure the degree of work functioning impairment in Japanese workers based on the Rasch model. Given that the number of foreign workers employed in Japan and abroad has increased in recent years, a multilingual questionnaire is becoming increasingly necessary to investigate work functioning impairment in these workers. The purpose of this study was to verify the cross‐cultural validity of WFun between Japanese, Chinese, and English versions. Methods A cross‐sectional study was conducted in two stages. First, the Chinese and English versions of WFun were created. Second, an internet survey was conducted among 1000 Japanese, 400 Chinese, and 300 Americans. Estimates and standard errors of an individual's ability and item difficulty were calculated using the Rasch model. Differential item functioning (DIF) and differential test functioning (DTF) were also examined using Rasch model analyses. Results The effect size of DIF for one item in the English version exceeded 0.5 logit, indicating the presence of some DIF. In contrast, the effect sizes of DIF for all other items were below 0.5 logit, indicating that the influence of DIF was negligible. Furthermore, Rasch measurements according to the raw score for each version of WFun showed strong agreement among the three versions, with an intraclass correlation of 0.98 (95% confidence interval: 0.97‐0.99), indicating the absence of DTF. Conclusions Our findings indicate that the English, Chinese, and Japanese versions of WFun have good comparability.

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Validation of the Japanese version of the CDC HRQOL-4 in workers

Chimed‐Ochir

Mine

Okawara

et al. 2020

Journal of Occupational Health

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Background We set out to investigate the reliability and validity of the Japanese version of the CDC core healthy day measures assessing health‐related quality of life (CDC HRQOL‐4) in Japanese workers. Methods This cross‐sectional study was conducted among 1360 Japanese workers of one Japanese company located in Kyushu. Cronbach's alpha was calculated to evaluate the internal consistency of CDC HRQOL‐4 items. The concurrent validity was tested by assessing whether the CDC HRQOL‐4 items correlated well with the corresponding domains of the SF‐8 and the overall WFun score. The construct validity was tested by assessing the ability of the CDC HRQOL‐4 to discriminate groups with and without any current disease, pain, mental problem, and sleeping disorder. Results Cronbach's alpha for three of the four CDC HRQOL‐4 items was 0.80, which is greater than the minimal standard (0.70) recommended for internal consistency reliability. Correlation coefficients ranging from 0.25 to 0.67 were obtained between CDC HRQOL‐4 items and the SF‐8 domains and WFun score. Workers with any current disease, mental problem, pain or sleeping disorder reported higher numbers of unhealthy days, and a higher odd of poor health than those without such problems. Japanese version of the CDC HRQOL‐4 shows a good concurrent validity with the SF‐8 and the WFun tool and good construct validity among Japanese workers in the current study. Conclusions Japanese version of the CDC HRQOL‐4 is a reliable and valid instrument that may be used to assess overall health and physically and mentally unhealthy days in Japanese workers.

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Development and validity of a work functioning impairment scale based on the Rasch model among Japanese workers

Cited by 75 publications

References 33 publications

Construct validity and test-retest reliability of the World Mental Health Japan version of the World Health Organization Health and Work Performance Questionnaire Short Version: a preliminary study

Construct validity and test-retest reliability of the World Mental Health Japan version of the World Health Organization Health and Work Performance Questionnaire Short Version: a preliminary study

Cross‐cultural validation of the work functioning impairment scale (WFun) among Japanese, English, and Chinese versions using Rasch analysis

Validation of the Japanese version of the CDC HRQOL-4 in workers

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