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Table 5 Logistic regression analysis of factors related to sleep quality

From: Factors Related to Sleep Disorders among Male Firefighters

   OR§(95% CIǁ)  
Variables Model I* Model II Model III
Age (years)       
  ≤29 1.00   1.00   1.00  
  30 ~ 39 1.38 (0.82-2.34) 1.32 (0.77-2.29) 1.15 (0.63-2.01)
  40 ~ 49 0.86 (0.52-1.44) 0.91 (0.53-1.55) 0.71 (0.41-1.24)
  ≥50 0.74 (0.39-1.40) 0.76 (0.40-1.47) 0.57 (0.28-1.14)
Alcohol intake       
  No 1.00   1.00   1.00  
  Yes 1.37 (0.99-1.87) 1.41 (1.01-1.97) 1.34 (0.94-1.92)
Shift work       
  No 1.00   1.00   1.00  
  Yes 1.66 (1.12-2.47) 1.63 (1.08-2.46) 1.58 (1.02-2.45)
Musculoskeletal symptoms       
  No    1.00   1.00  
  Yes    3.37 (2.40-4.74) 2.89 (2.02-4.14)
BDI-2       
  Normal range      1.00  
  Abnormal range      7.04 (4.03-12.30)
Total job stress**       
  Low      1.00  
  High      0.93 (0.93-2.72)
  1. *Model I was adjusted for age, alcohol intake, and shift work. Model II was adjusted for model I and musculoskeletal symptoms.
  2. Model III was adjusted for model II, depression, and total job stress. §Odds ratio ǁconfidential interval Beck Depression Inventory-II.
  3. **Sum of categories score/7.