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Table 3 Risk scores for low back pain with the inclusion of the Thai ERIQ

From: Development of a risk score for low back pain in office workers - a cross-sectional study

Factors Beta Coefficient Risk score*
Previous history of working as an office worker   
   Yes 0.54 1
   No   0
Years of work experience (years)   
   < 10   0
   10-19 1.25 3
   ≥20 0.71 1
Continuous standing >2 hrs/d   
   Yes 0.62 1
   No   0
Frequently bending forward during the work day   
   Yes 0.58 1
   No   0
Chair having lumbar support   
   Yes   0
   No 0.50 1
Backache Index   
   0   0
   ≥1 1.39 3
Effort-Reward ratio   
   ≤ 1   0
   >1 1.86 4
  1. * Reference groups were assigned a score of 0. β Coefficient of chair without lumbar support was assigned a score of 1 and then the other β Coefficient was multiplied by 2 (1/0.50) and rounded off to the nearest integer.