odds ordinal regression model was used to identify the most significant factors contributing towards
the WMSD symptoms which are, (1) inappropriate positioning of computer monitor and exposure to
prolonged awkward posture of the (2) trunk or torso, (3) shoulder‐upper arm, (4) forearm‐elbows and
(5) wrist and hand. Three equations were developed for predicting the probabilities of a user having
slightly, moderately or very uncomfortable pain when the postural and design factors are given.