Internal Consistency and Confirmatory Factor Analysis of Persian version Circadian Type Inventory in Iranian Day Worker and Shift Worker , 2011-2012.
Background and aims : "circadian" is the changes of behavioral and metabolic activity during day and night in living organisms. The human body has circadian rhythm too, which is repeated every 24 hours. The aim of this study is to determine the validity and reliability of the 11Q of CTI qu...
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Iran University of Medical Sciences
2013-09-01
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| Series: | Salāmat-i kār-i Īrān |
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| Online Access: | http://ioh.iums.ac.ir/article-1-720-en.html |
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| author | A jafari Roodbandi N Hasheminejad M Sadeghi M.R Baneshi S Haji Maghsoudi A Rastegari |
| author_facet | A jafari Roodbandi N Hasheminejad M Sadeghi M.R Baneshi S Haji Maghsoudi A Rastegari |
| author_sort | A jafari Roodbandi |
| collection | DOAJ |
| description | Background and aims : "circadian" is the changes of behavioral and metabolic activity during day and night in living organisms. The human body has circadian rhythm too, which is repeated every 24 hours. The aim of this study is to determine the validity and reliability of the 11Q of CTI questionnaire, according to Iranian workers society. Methods : Translation and cultural adaptation of CTI questionnaire was performed according to standard methods of Translate & Back translate. The content validity was done using the opinions of 10 experts. In this study, 30 rotating shift worker (SW) nurses and 30 employees of Day worker (DW) from Kerman University of Medical Sciences completed their questionnaire. To check the reliability the Cronbach's alpha was used followed by factor analysis to confirm the validity of the questionnaire. Data analysis was performed using the Lisrel 8.8 and spss18 software. Results : The questionnaire contains two domains: Rhythm stability of circadian and rhythm amplitude of circadian. Overall reliability of the questionnaire using Cronbach's alpha was calculated 0.76. Cronbach's alpha for amplitude and stability of rhythm for rotating nurse shift worker (SW) respectively was 0.70 and 0.82. Values of Cronbach’s alpha index for two domains were equal to 0.75 and 0.78 in day workers (DW) employees. The Kaiser index was 0.79, which indicates good conditions for the factor analysis. Chai-Square of Bartlett's test obtained (p-value< 0.0001) Shows the correlation between variables. Principal component analysis was performed with Varimax rotation analysis. With considering a two-factor model, 54.3% of the total variance was explained by two factors, the 39.51percentage was assigned with the first factor and 14.82% for the second factor. Conclusion: The Persian version of the CTI questionnaire can be used as a valid and reliable tool for determining the type circadian |
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| publishDate | 2013-09-01 |
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| series | Salāmat-i kār-i Īrān |
| spelling | doaj.art-8156a39f760d476299448b15eaf7dd682022-12-21T18:53:10ZfasIran University of Medical SciencesSalāmat-i kār-i Īrān1735-51332228-74932013-09-011034551Internal Consistency and Confirmatory Factor Analysis of Persian version Circadian Type Inventory in Iranian Day Worker and Shift Worker , 2011-2012.A jafari Roodbandi0N Hasheminejad1M Sadeghi2M.R Baneshi3S Haji Maghsoudi4A Rastegari5 MSc student of occupational health, member of Kerman medical student research committee. Kerman university medical science, Kerman,Iran. Background and aims : "circadian" is the changes of behavioral and metabolic activity during day and night in living organisms. The human body has circadian rhythm too, which is repeated every 24 hours. The aim of this study is to determine the validity and reliability of the 11Q of CTI questionnaire, according to Iranian workers society. Methods : Translation and cultural adaptation of CTI questionnaire was performed according to standard methods of Translate & Back translate. The content validity was done using the opinions of 10 experts. In this study, 30 rotating shift worker (SW) nurses and 30 employees of Day worker (DW) from Kerman University of Medical Sciences completed their questionnaire. To check the reliability the Cronbach's alpha was used followed by factor analysis to confirm the validity of the questionnaire. Data analysis was performed using the Lisrel 8.8 and spss18 software. Results : The questionnaire contains two domains: Rhythm stability of circadian and rhythm amplitude of circadian. Overall reliability of the questionnaire using Cronbach's alpha was calculated 0.76. Cronbach's alpha for amplitude and stability of rhythm for rotating nurse shift worker (SW) respectively was 0.70 and 0.82. Values of Cronbach’s alpha index for two domains were equal to 0.75 and 0.78 in day workers (DW) employees. The Kaiser index was 0.79, which indicates good conditions for the factor analysis. Chai-Square of Bartlett's test obtained (p-value< 0.0001) Shows the correlation between variables. Principal component analysis was performed with Varimax rotation analysis. With considering a two-factor model, 54.3% of the total variance was explained by two factors, the 39.51percentage was assigned with the first factor and 14.82% for the second factor. Conclusion: The Persian version of the CTI questionnaire can be used as a valid and reliable tool for determining the type circadianhttp://ioh.iums.ac.ir/article-1-720-en.htmlkey words: factor structurevalidityreliabilitycircadian type inventory. |
| spellingShingle | A jafari Roodbandi N Hasheminejad M Sadeghi M.R Baneshi S Haji Maghsoudi A Rastegari Internal Consistency and Confirmatory Factor Analysis of Persian version Circadian Type Inventory in Iranian Day Worker and Shift Worker , 2011-2012. Salāmat-i kār-i Īrān key words: factor structure validity reliability circadian type inventory. |
| title | Internal Consistency and Confirmatory Factor Analysis of Persian version Circadian Type Inventory in Iranian Day Worker and Shift Worker , 2011-2012. |
| title_full | Internal Consistency and Confirmatory Factor Analysis of Persian version Circadian Type Inventory in Iranian Day Worker and Shift Worker , 2011-2012. |
| title_fullStr | Internal Consistency and Confirmatory Factor Analysis of Persian version Circadian Type Inventory in Iranian Day Worker and Shift Worker , 2011-2012. |
| title_full_unstemmed | Internal Consistency and Confirmatory Factor Analysis of Persian version Circadian Type Inventory in Iranian Day Worker and Shift Worker , 2011-2012. |
| title_short | Internal Consistency and Confirmatory Factor Analysis of Persian version Circadian Type Inventory in Iranian Day Worker and Shift Worker , 2011-2012. |
| title_sort | internal consistency and confirmatory factor analysis of persian version circadian type inventory in iranian day worker and shift worker 2011 2012 |
| topic | key words: factor structure validity reliability circadian type inventory. |
| url | http://ioh.iums.ac.ir/article-1-720-en.html |
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