The Effect of Alternative Keyboards on Discomfort and Typing Kinematics
This trial is active, not recruiting.
|Sponsor||University of Pittsburgh|
|Collaborator||National Institute for Occupational Safety and Health (NIOSH/CDC)|
|Start date||January 2009|
|End date||April 2011|
|Trial size||84 participants|
|Trial identifier||NCT00801983, 08030467, R01OH008961|
Awkward postures during computer keyboard use have been hypothesized to be one cause of musculoskeletal pain/discomfort as well as musculoskeletal disorders of the upper extremity (MSD-UE). Alternative computer keyboards purport to reduce musculoskeletal pain/discomfort and have been shown to change aspects of keyboard users' kinematics under laboratory conditions. However, research that has examined the effectiveness of alternative keyboards in reducing musculoskeletal pain/discomfort in the workplace is equivocal, and no study has examined the association between postures and musculoskeletal pain. The Aims of this 3-year prospective double cross-over trial are: 1) To examine the effectiveness of an alternative keyboard in reducing reports of pain over 6-months; 2) To examine the neutrality and stability of postures during keyboard use; and 3) To identify which postures are associated with lower levels of musculoskeletal pain. Seventy-five computer users will be randomly assigned to one of two keyboard use orders: Group 1 - AB (standard keyboard, alternative keyboard); Group 2 - BA (alternative keyboard, standard keyboard). All subjects will use their assigned keyboards for 6-months before switching to the next keyboard. Every week, subjects will report their musculoskeletal pain levels. Just prior to and just after each 6-month intervention subjects' kinematics performances on the keyboards will be recorded at the worksite using the Keyboard - Personal Computing Style (K-PeCS) instrument and in a laboratory setting using 3-dimensional motion capture technology.
Aim 1: To examine the effectiveness of an alternative keyboard in reducing pain over 6-months.
Hypothesis 1 (H-1) - At six months subjects using an alternative keyboard will have significantly lower musculoskeletal pain levels than when using a standard keyboard.
Aim 2: To examine the neutrality and stability of postures during keyboard use.
Hypothesis 3 (H-2) - Subjects using an alternative keyboard will have significantly more neutral postures than when using a standard keyboard at baseline and at 6 months Hypothesis 3 (H-3) - Subjects 6-months keyboarding postures will remain equivalent to the keyboarding postures documented at baseline.
|Endpoint classification||safety/efficacy study|
|Intervention model||crossover assignment|
time frame: 6 months
time frame: 6 months
Male or female participants from 18 years up to 65 years old.
Inclusion Criteria: - Use a computer at least 20 hrs per week - Aged 18-65 - Experiencing some pain during computer use Exclusion Criteria: - Currently use an alternative keyboard - Serious trauma injury to the upper extremity - Rheumatic disorder
|Official title||The Effect of Alternative Keyboards on Discomfort and Typing Kinematics|
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