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Table 1 General and psychosocial characteristics of the study population (n = 657)

From: Factors Related to Sleep Disorders among Male Firefighters

Variables n %
Age (years)   
  ≤29 79 12.0
  30 ~ 39 221 33.6
  40 ~ 49 261 39.7
  ≥50 96 14.6
Tenure (years)   
  <10 280 42.6
  10 ~ 19 226 34.4
  ≥20 151 23.0
Marital status   
  Unmarried 135 20.5
  Married 522 79.5
Exercise   
  No 332 50.5
  Yes 325 49.5
Alcohol intake   
  No 264 40.2
  Yes 393 59.8
Smoking   
  No 517 78.7
  Yes 140 21.3
BMI* (kg/m2)   
  <25 420 63.9
  ≥25 237 36.1
Department   
  Administrative job 158 24.0
  Non-Administrative job 499 76.0
Musculoskeletal symptoms   
  No 416 63.3
  Yes 241s 36.7
Shift work   
  No 143 21.8
  Yes 514 78.2
Sleep quality   
  Good 337 51.3
  Poor 320 48.7
BDI-2   
  Normal range 536 81.6
  Abnormal range 121 18.4
PWI-SF   
  Healthy group 68 10.4
  Latent stress group 482 73.4
  Stress group 107 16.2
  1. *Body mass index.
  2. Beck Depression Inventory-II.
  3. Psychosocial Well-Being Index-Short Form.