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Table 4 Odds ratios (OR), 95% confidence intervals (95%CI) and significance of personality factors for belonging to the group with long overtime work hours and excessive overtime work

From: Effects of personality on overtime work: a cross-sectional pilot study among Japanese white-collar workers

Personality factor   Long overtime work hours Excessive overtime work
   OR 95% CI P OR 95% CI P
Extraversion High 1.00     1.00    
  Low 0.88 0.46 1.68 0.70 2.02 1.02 4.02 0.04
Agreeableness High 1.00     1.00    
  Low 0.83 0.43 1.58 0.57 1.69 0.85 3.36 0.13
Conscientiousness High 1.00     1.00    
  Low 0.94 0.48 1.84 0.85 1.51 0.75 3.06 0.25
Emotional stability High 1.00     1.00    
  Low 0.66 0.34 1.28 0.22 1.54 0.77 3.06 0.22
Openness High 1.00     1.00    
  Low 0.75 0.38 1.50 0.42 1.14 0.56 2.33 0.72
  1. Each personality factor was adjusted for any socio-demographic factor or work-place related factor significant in univariate model. Adjusted factors were sex, age, BMI, meal times, marital status, position, job demand, decision latitude, social support, taking paid holidays, stopping work, difficulty going home and fear of the boss.