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Table 1 General and occupational characteristics of study participants*

From: Night shift work and inflammatory markers in male workers aged 20–39 in a display manufacturing company

Variables Work schedule group (n = 244) p-value
Daytime
(n = 112)
Former shift
(n = 46)
Current shift
(n = 86)
Age (years) 32.2 ± 4.3 32.9 ± 2.9 33.3 ± 3.5 0.091
Marital status
 Married 62(55.4) 28(60.9) 57(66.3) 0.296
 Other 50(44.6) 18(39.1) 29(33.7)
Education level (years)
  ≤ 12 8(7.1) 9(19.6) 22(25.6) 0.002
  > 12 104(92.9) 37(80.4) 64(74.4)
Alcohol consumption
 Non-Drinker 23(20.5) 6(13.0) 18(20.9) 0.493
 Drinker 89(79.5) 40(87.0) 68(79.1)
Smoking
 No 100(89.3) 37(80.4) 64(74.4) 0.023
 Yes 12(10.7) 9(19.6) 22(25.6)
Regular exercise
 No 9(8.0) 5(10.9) 11(12.8) 0.543
 Yes 103(92.0) 41(89.1) 75(87.2)
Sleep duration (hours/day) 6.33 ± 0.92 6.25 ± 1.04 6.47 ± 0.93 0.381
Sleep debt (hours/day) 1.21a ± 0.93 1.39 ± 0.91 1.56a ± 1.01 0.037
Sleep insufficiency (days/week) 1.47a ± 1.43 1.81 ± 1.75 2.07a ± 1.43 0.019
Weekly work hours
  < 48 25(22.3) 12(26.1) 13(15.1) 0.267
  ≥ 48 87(77.7) 34(73.9) 73(84.9)
  1. *values are mean ± standard deviation or number(%)
  2. compared using chi-square test or one-way analysis of variance
  3. asame letters indicate statistical significance