This randomized clinical trial evaluated the effects of keyboard keyswitch design on computer users with hand paresthesias.
Twenty computer users were matched and randomly assigned to keyboard A (n=10) or B (n=10).
The keyboards were of conventional layout and differed in keyswitch design.
Various outcome measures were assessed during the 12 weeks of use.
Subjects assigned keyboard A experienced a decrease in hand pain between weeks 6 and 12 when compared with keyboard B subjects (P=0.05) and demonstrated an improvement in the Phalen test time (right hand, P=0.006 ; left hand, P=0.06).
Keyboard assignment had no significant effect on change in hand function or median nerve latency.
We conclude that use of keyboard A for 12 weeks led to a reduction in hand pain and an improved physical examination finding when compared with keyboard B. There was no corresponding improvement in hand function or median nerve latency.
Mots-clés Pascal : Exposition professionnelle, Ergonomie, Médecine travail, Employé bureau, Conception ordinateur, Paresthésie, Main, Clavier, Homme, Etude comparative, Condition travail, Manipulation instrument, Ordinateur, Système nerveux pathologie, Trouble neurologique, Trouble sensibilité
Mots-clés Pascal anglais : Occupational exposure, Ergonomics, Occupational medicine, Clerical personnel, Computer design, Paresthesia, Hand, Keyboard, Human, Comparative study, Working condition, Tool use, Computer, Nervous system diseases, Neurological disorder, Sensitivity disorder
Notice produite par :
Inist-CNRS - Institut de l'Information Scientifique et Technique
Cote : 99-0159934
Code Inist : 002B30B02A. Création : 16/11/1999.