Effect of keyboard keyswitch design on hand pain.
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.