Is anyone aware of published guidelines or standards for maximum number of keystroke or mouse clicks for a specific duration or day? The office type guidelines I’m aware of are specific to furniture, reach distances etc. Thanks for your help.
NIOSH Study Finds Supplementary Breaks Minimized Discomfort, Did Not Impair Productivity A new NIOSH study supports earlier research findings that supplementary rest breaks minimize discomfort and eyestrain among data-entry employees without impairing productivity. Participants
You might try this article, it states “… a significant association only when time spent using a mouse exceeded 30 h/wk.” and “Repetitive keying of 8000 to 12000 keystrokes/h has been found to be a risk factor for arm, hand, and elbow pain.”, however, read the entire article carefully. Computer use and carpal tunnel syndrome: a 1-year follow-up study. Andersen JH, Thomsen JF, Overgaard E, Lassen CF, Brandt LP, Vilstrup I, Kryger AI, Mikkelsen S.
Department of Occupational Medicine, Herning Hospital, Herning, Denmark. [email protected]
CONTEXT: Computer use is increasingly common among many working populations, and concern exists about possible adverse effects of computer use, such as carpal tunnel syndrome (CTS). OBJECTIVES: To estimate the prevalence and incidence of possible CTS and to evaluate the contribution of use of mouse devices and keyboards to the risk of possible CTS. DESIGN AND SETTING: A 1-year follow-up study with questionnaires conducted in 2000 and 2001 at 3500 workplaces in Denmark, followed on each of the 2 occasions by a clinical interview on symptom distribution and frequency. PARTICIPANTS: The questionnaire was sent to 9480 members of a trade union, with an initial response rate of 73% (n = 6943), and 82% (n = 5658) at follow-up. MAIN OUTCOME MEASURES: At baseline, there were 3 outcome measures: tingling/numbness in the right hand once a week or more as reported in the questionnaire; tingling, numbness, and pain in the median nerve in the right hand confirmed by clinical interview; and tingling, numbness, and pain in the median nerve in the right hand at night confirmed by clinical interview. At 1 year of follow-up the main outcome of interest was onset of symptoms among participants who had no or minor symptoms at baseline. RESULTS: The overall self-reported prevalence of tingling/numbness in the right hand at baseline was 10.9%. The interview confirmed that prevalence of tingling/numbness in the median nerve was 4.8%, of which about one third, corresponding to a prevalence of 1.4%, experienced symptoms at night. Onset of new symptoms in the 1-year follow-up was 5.5%. In the cross-sectional comparisons and in the follow-up analyses, there was an association between use of a mouse device for more than 20 h/wk and risk of possible CTS but no statistically significant association with keyboard use. CONCLUSIONS: The occurrence of possible CTS in the right hand was low. The study emphasizes that computer use does not pose a severe occupational hazard for developing symptoms of CTS.
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