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Table 2 Bivariate correlations between personal characteristics, worksite characteristics, work stressors and different dimensions of fatigue

From: Fatigue in ferry shipping employees: the role of work-family conflict and supervisor support

 SOFI lack of energySOFI physical exertionSOFI physical discomfortSOFI lack of motivationSOFI sleepiness
Age−0.02−0.05− 0.08− 0.13− 0.13
Gendera0.100.020.21**0.060.14
School educationb0.05−0.040.010.030.05
Professional educationc−0.11−0.06− 0.20*−0.12− 0.16*
Professional groupd0.140.060.21**0.130.18*
Living with a partnere0.040.100.110.010.07
Children under 6 yearsf−0.12−0.06− 0.10−0.07− 0.07
Ferry ship companyg0.090.020.130.040.10
Workplaceh−0.13− 0.09− 0.16*−0.14− 0.20*
Number of workdays per week−0.08− 0.040.07− 0.13−0.06
Typical work timei0.20*0.16*0.26**0.17*0.19*
Sleeping at the workplace/on boardj−0.12−0.08−0.13− 0.13−0.15
Physical activity k−0.100.01−0.04−0.04− 0.07
Smokingl0.050.020.070.02−0.01
Sleeping trouble0.45′**0.35***0.39***0.36***0.44***
Job demands0.40***0.30***0.27***0,34***0.36***
Work-family conflict0.48***0.33***0.36***0.43***0.42***
Support from supervisor−0.28***− 0.19*− 0.23**−0.31***− 0.26**
SOFI Lack of energy10.66***0.70***0.80***0.82***
SOFI Physical exertion0.66***10.67***0.74***0.72***
SOFI Physical discomfort0.70***0.67***10.60***0.67***
SOFI Lack of motivation0.80***0.74***0.60***10.84***
SOFI Sleepiness0.82***0.72***0.67***0.84***1
  1. *Significant value: P <0.05. ** Significant value: P <0.01. ***Significant value: P <0.001.
  2. afemale = 2
  3. bprimary school = 1, secondary school = 2
  4. cvocational training = 1, university college/university = 2
  5. dofficers = 1, non-officers = 2
  6. eyes = 2
  7. fyes = 2
  8. gcompany 1 = 1, company 2 = 2
  9. hterminal = 1, ferry ship = 2
  10. iday and evening = 1, day, evening and night = 2
  11. jyes = 2
  12. k0-4 h per week/low intensity = 1, ≥2 hoursh per week/high intensity = 2
  13. lyes = 2