According to the RULA method, 52% of the cases for the right hand and 54% for
the left hand were at grade 3, 2% for both hands were at grade 4 and in the automatic PC
board tester job, 25% of the cases in both hands were at grade 4. According to the SI scoring,
64% of the cases in the right hand and 42% of them in the left hand were unsafe. Moreover,
the most prevalent disorders were seen in waist and shoulder (48%), wrist (32%), neck
(28%) and back (24%). There was a correlation between work experience and shoulder pain
(P=0.016) and leg pain (P=0.032) and between the results of the SI method in the left hand
and shoulder pain (P=0.002). Kappa coefficient showed the agreement between the results of
both RULA and SI methods.