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Table 3 Correlation of sleep quality with general and psychosocial factors

From: Factors Related to Sleep Disorders among Male Firefighters

  Sleep quality  
Variables Good Poor p-value*
n (%) n (%)  
Age (years)    
  ≤29 38 (48.1) 41 (51.9) 0.003
  30 ~ 39 96 (43.4) 125 (56.6)  
  40 ~ 49 143 (54.8) 118 (45.2)  
  ≥50 60 (62.5) 36 (37.5)  
Tenure (years)    
  <10 133 (47.5) 147 (52.5) 0.007
  10 ~ 19 110 (48.7) 116 (51.3)  
  ≥20 94 (62.3) 57 (37.7)  
Marital status    
  Unmarried 66 (48.9) 69 (51.1) 0.531
  Married 271 (51.9) 251 (48.1)  
Exercise    
  No 168 (50.6) 164 (51.3) 0.720
  Yes 169 (52.0) 156 (48.0)  
Alcohol intake    
  No 148 (56.1) 116 (43.9) 0.045
  Yes 189 (48.1) 204 (51.9)  
Smoking    
  No 275 (53.2) 242 (46.8) 0.061
  Yes 62 (44.3) 78 (55.7)  
BMI (kg/m2)    
  <25 217 (51.7) 203 (48.3) 0.799
  ≥25 120 (50.6) 117 (49.4)  
Department    
  Administrative job 97 (61.4) 61 (38.6) 0.004
  Non-Administrative job 240 (48.1) 259 (51.9)  
Musculoskeletal symptoms    
  No 259 (62.3) 157 (37.7) <0.001
  Yes 78 (32.4) 163 (67.6)  
Shift work    
  No 88 (61.5) 55 (38.5) 0.006
  Yes 249 (48.4) 265 (51.6)  
BDI-2    
  Normal range 319 (59.5) 217 (40.5) <0.001
  Abnormal range 18 (14.9) 103 (85.1)  
PWI-SF§    
  Healthy group 58 (85.3) 10 (14.7) <0.001
  Latent stress group 262 (15.9) 220 (45.6)  
  Stress group 17 (15.9) 90 (84.1)  
  1. *Calculated using theχ2-test and linear-by-linear association.
  2. Beck Depression Inventory-II.
  3. Body mass index.
  4. §Psychosocial Well-Being Index-Short Form.