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Table 3 Logistic regression analysis of regarding factors in the previous one month on depressive symptoms

From: National survey of the association of depressive symptoms with the number of off duty and on-call, and sleep hours among physicians working in Japanese hospitals: a cross sectional study

  Men Women
Variables Crude Adjusted Crude Adjusted
  OR (95% CI) ORa (95% CI) OR (95% CI) ORa (95% CI)
The number of days of off-duty per month
   None 2.13 (1.42 to 3.19) 1.62 (1.05 to 2.52) 3.30 (1.64 to 6.64) 2.39 (1.10 to 5.19)
   1-4 days 1.30 (0.96 to 1.75) 1.10 (0.80 to 1.51) 1.02 (0.57 to 1.83) 0.75 (0.40 to 1.42)
   5-7 days 1.00   1.00   1.00   1.00  
   8 days or more 0.52 (0.32 to 0.86) 0.53 (0.31 to 0.90) 0.81 (0.44 to 1.51) 1.08 (0.55 to 2.12)
The number of days of on-call per month
   None 1.00   1.00   1.00   1.00  
   1-4 days 1.36 (0.95 to 1.95) 1.27 (0.88 to 1.84) 1.53 (0.84 to 2.79) 1.55 (0.80 to 3.00)
   5-7 days 1.91 (1.28 to 2.84) 1.75 (1.15 to 2.64) 1.41 (0.57 to 3.49) 1.14 (0.43 to 3.06)
   8 days or more 2.19 (1.58 to 3.04) 1.77 (1.24 to 2.52) 2.41 (1.41 to 4.1) 1.80 (0.98 to 3.28)
Average sleeping hours for days not working overnight
   Less than 5 hours 2.79 (1.96 to 3.95) 2.70 (1.82 to 4.03) 2.65 (1.47 to 4.78) 2.38 (1.11 to 5.10)
   5 to less than 6 hours 1.33 (0.98 to 1.81) 1.20 (0.88 to 1.65) 1.62 (0.96 to 2.74) 1.54 (0.89 to 2.67)
   6 to less than 7 hours 1.00   1.00   1.00   1.00  
   7 hours or more 1.10 (0.71 to 1.70) 1.32 (0.84 to 2.08) 1.12 (0.49 to 2.54) 1.08 (0.46 to 2.49)
The number of days of overnight work per month
   None 1.00   1.00   1.00   1.00  
   Once 1.21 (0.75 to 1.95) 1.00 (0.60 to 1.65) 1.06 (0.40 to 2.79) 0.84 (0.29 to 2.40)
   2 to 3 times 1.47 (1.04 to 2.08) 1.14 (0.74 to 1.67) 2.06 (1.17 to 3.62) 1.65 (0.86 to 3.17)
   4 to 5 times 1.33 (0.92 to 1.94) 1.11 (0.74 to 1.68) 1.31 (0.63 to 2.71) 1.21 (0.53 to 2.77)
   6 times or more 1.77 (1.19 to 2.64) 1.33 (0.86 to 2.07) 2.37 (1.15 to 4.89) 1.90 (0.82 to 4.42)
  1. OR, odds ratio; CI, confidence interval
  2. aORs are adjusted for age and all other variables in the table