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Table 2 Occupational characteristics of the subjects

From: Occupational Factors Associated with Changes in the Body Mass Index of Korean Male Manual Workers

Variables 5 years or less* More than 5 years*
  No(%) BMI change No(%) BMI change
Working hours ≤ 9 hours 44(29.1) 0.29 ± 1.04 36(24.3) 0.31 ± 0.85
  > 9 hours, < 12 hours 74(49.0) 0.33 ± 1.07 78(52.7) 0.21 ± 1.09
  ≥ 12 hours 33(21.9) 0.71 ± 1.02 34(23.0) 0.37 ± 1.05
Shift work No shift work 114(75.5) 0.35 ± 0.98 90(60.8) 0.23 ± 1.07
  Two shifts 11( 7.3) 0.50 ± 1.24 19(12.8) 0.29 ± 0.84
  Three shifts 26(17.2) 0.58 ± 1.30 39(26.4) 0.36 ± 1.02
Sitting time (% of workday) 0-24% 26(17.2) 0.43 ± 1.20 33(22.3) 0.37 ± 0.93
  25-49% 50(33.1) 0.38 ± 0.92 54(36.5) 0.04 ± 1.08
  50-74% 47(31.1) 0.25 ± 0.89 37(25.0) 0.40 ± 0.92
  75-100% 27(17.9) 0.74 ± 1.35 24(16.2) 0.45 ± 1.14
Job stress      
Job demand Low 84(55.6) 0.45 ± 1.16 101(68.2) 0.22 ± 1.01
  High 63(41.7) 0.36 ± 0.93 46(31.1) 0.42 ± 1.04
Insufficient job control Low 102(67.5) 0.56 ± 1.06 102(68.9) 0.25 ± 0.96
  High 45(29.8) 0.10 ± 1.03 45(30.4) 0.34 ± 1.16
Inadequate social support Low 100(66.2) 0.46 ± 1.10 107(72.3) 0.18 ± 1.03
  High 46(30.5) 0.31 ± 1.00 40(27.0) 0.55 ± 0.96
Job insecurity Low 110(72.8) 0.39 ± 1.10 113(76.4) 0.23 ± 0.96
  High 36(23.8) 0.49 ± 0.97 33(22.3) 0.44 ± 1.21
Organizational injustice Low 105(69.5) 0.43 ± 1.10 109(73.6) 0.17 ± 0.98
  High 41(27.2) 0.36 ± 1.00 37(25.0) 0.60 ± 1.07
Lack of reward Low 102(67.5) 0.57 ± 1.13 97(65.5) 0.15 ± 0.98
  High 45(29.8) 0.07 ± 0.82 50(33.8) 0.53 ± 1.06
Poor occupational climate Low 76(50.3) 0.45 ± 1.21 85(57.4) 0.24 ± 0.95
  High 70(46.4) 0.37 ± 0.89 61(41.2) 0.33 ± 1.12
  1. * Length of experience working at the present post.
  2. † Mean ± SD, kg/m2.