The relationship between video display terminals (VDTs) usage and dermatologic manifestations : a cross sectional study
Department of Occupational Medicine, Faculty of Medicine, Tehran University of Medical Sciences, Tehran, Iran
BMC Dermatology 2005, 5:3 doi:10.1186/1471-5945-5-3Published: 3 April 2005
Recently, it has been observed that Video Display Terminals (VDTs) usage for long periods can cause some dermatological manifestations on the face. An analytical cross-sectional study was designed in order to determine this relationship.
In this study, 600 office workers were chosen randomly from an organization in Tehran (Iran).
The subjects were then divided into two groups based on their exposure to VDTs.
306 workers were considered exposure negative (non VDT user) who worked less than 7 hours a week with VDTs. The remainders 294 were exposure-positive, who worked 7 hours or more with VDTs. The frequency of dermatologic manifestations was compared in these two groups.
In the exposure-positive and exposure-negative groups, the frequency of these dermatologic manifestations were 27 and 5 respectively.
After statistical analysis, a P.value of < 0.05 was obtained indicating a statistically significant difference between these two groups for dermatological manifestations.
According to our study, there is a relationship between dermatologic manifestations on the face and exposure to VDTs.