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J Pak Med Assoc. 2012 Mar;62(3):213-7.

Knowledge and practices of ergonomics in computer users.

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Department of Physiology, Bahria University Medical & Dental College, Karachi.



To assess knowledge and practices of ergonomics among desktop users of different professions.


It was an observational cross-sectional study conducted over a two-week timeframe (from November 7 to 21 2009), through a self-reporting questionnaire. Responses were analysed using SPSS version 15 and considered significant at p value<0.05.


The study population comprised 210 males and 134 females. Of the total, 52% said they had heard about ergonomics, while 92% were aware of its importance. Knowledge about the importance of arm-rest (24%) and backrest inclination at 120 degrees (32%) was there, but practised by 21% and 31% respectively (p = <0.02). Straight placement of wrist in line with elbow was known to 194 (56.39%) and practiced by 138 (40%), while 186 (54.06%) respondents had knowledge about the ideal height of the chair, but it was adjusted only by 112 (32%). Disproportion was observed between the knowledge and practices of correct viewing distance from the computer screen, maintaining print at eye level, keeping computer screen free of glare and moving the chair for better keyboard use.


Almost half of the respondents were not aware of the principles behind safe ergonomic practices. Even those who had the knowledge were not able to carefully and entirely apply this for prevention from health hazards.

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