Computer keyboard force and upper extremity symptoms.
This case-control study assessed whether office workers who report more severe levels of musculoskeletal symptoms of the upper extremities demonstrate higher levels of keyforce in comparison to controls with less severe symptoms.
Office workers reporting working on computer keyboards for four hours per day were classfied as cases or controls based upon a median split on a Composite Symptom Severity score (cases=23, controls=25).
Keyboard force and keying rate were measured during a 15-minute keyboarding task.
Measures of task-related discomfort, muscular fatigue, pain, upper extremity symptoms, psychological distress and force were collected at baseline, post-keyboard task, and recovery.
Ratings of perceived effort and task credibility were also obtained.
Measures of work demands, perceived job stress, and upper extremity strength and flexibility were also collected.
The results indicated group equivalence on reported work demands and upper extremity strength.
Cases were more likely to receive a medical diagnosis of upper extremity cumulative trauma disorder, awaken from sleep due to symptoms, report higher levels of pain during work, experience greater impact of pain on function, and report higher workload pressure and lower support.
Cases generated significantly higher keyboarding forces than controls, although both groups produced forces well above that required to operate the keyboard (4-5 times activation force). (...)
Mots-clés Pascal : Ordinateur, Clavier, Exposition professionnelle, Médecine travail, Système ostéoarticulaire pathologie, Homme, Extrémité supérieure, Traumatisme, Activité professionnelle, Indice gravité, Doigt, Membre supérieur, Ergonomie, Poste travail
Mots-clés Pascal anglais : Computer, Keyboard, Occupational exposure, Occupational medicine, Diseases of the osteoarticular system, Human, Upper extremity, Trauma, Professional activity, Severity score, Finger, Upper limb, Ergonomics, Workplace layout
Notice produite par :
Inist-CNRS - Institut de l'Information Scientifique et Technique
Cote : 98-0073704
Code Inist : 002B16H. Création : 14/05/1998.