Abstract
Background. To validate the 17-item Computer Vision Symptom Scale questionnaire (CVSS17) in Italian. Methods. Cross-sectional validation study on video terminal (VDT) users and a reference sample of subjects not working at a VDT (control group), cognitively able to respond to a health status interview. The Italian self-administered version of the CVSS17 questionnaire was administered to all participants. The reliability and validity of the Italian translation of the CVSS17 were tested using standard statistical methods for questionnaire validation. The Rasch analysis was performed as well. Results. A total of 216 subjects were enrolled. Concerning the reliability, the Cronbach’s alpha coefficient was 0.925 (from 0.917 to 0.924), and the test–retest stability was 0.91 (<0.001). Concerning the validity, the control group had significantly better scores, and there were good correlations between responses to the CVSS17 and analogous domains of the GSS. Conclusion. The Italian version of the CVSS17 has shown psychometric properties comparable to those of the Spanish version, having good validity, discriminatory power, internal consistency and reliability. The questionnaire is a specific measure of vision-related quality of life in Italian-speaking VDT workers and can be used both in clinical practice and for research purposes.
Highlights
The aim of the present study was to validate the Italian version of the 17-item Computer Vision Symptom Scale questionnaire, to make a tool available for assessing the symptoms of ocular strain from the patient’s point of view and to be used for all subjects with ocular symptoms due to prolonged stays at a video terminal (VDT)
The two groups were similar apart from the age (p = 0.002), the time spent at video terminals (p = 0.0001), the years since working at a VDT
The recent COVID-19 pandemic has increased the number of subjects who spend many hours at a terminal and the number of people around the world who complain of disturbances related to prolonged use of video terminals has increased
Summary
Video display terminal (VDT) users often report computer-related visual and ocular symptoms, which are the most common health problems among these subjects. Studies to estimate the prevalence of computer-related visual and ocular symptoms were based on specific questionnaires designed by some authors [4,5]. Scale (CVSS17) questionnaire to assess visual and ocular symptoms in VDT workers: it includes 17 items and has been designed and validated for the Spanish language and culture. To validate the 17-item Computer Vision Symptom Scale questionnaire (CVSS17) in Italian. Cross-sectional validation study on video terminal (VDT) users and a reference sample of subjects not working at a VDT (control group), cognitively able to respond to a health status interview. The reliability and validity of the Italian translation of the CVSS17 were tested using standard statistical methods for questionnaire validation. Concerning the validity, the control group had significantly better scores, and there were good correlations between responses to the CVSS17 and analogous domains of the GSS
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