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Table 2 Associations between depressive symptoms and the studied variables in the previous one month

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
  Without depressive symptoms With depressive symptoms Without depressive symptoms With depressive symptoms
  n = 2773 (%) n = 252 (%) n = 749 (%) n = 88 (%)
The number of days of off-duty per month
   None 256 (85.6) 43 (14.4) 54 (77.1) 16 (22.9)
   1-4 days 1088 (90.4) 115 (9.6) 253 (90.7) 26 (9.3)
   5-7 days 915 (92.8) 71 (7.2) 201 (90.5) 21 (9.5)
   8 days or more 514 (95.7) 23 (4.3) 241 (90.6) 25 (9.4)
The number of days of on-call per month
   None 1260 (94.2) 78 (5.8) 445 (93.5) 31 (6.5)
   1-4 days 615 (91.9) 54 (8.1) 130 (87.2) 19 (12.8)
   5-7 days 338 (89.2) 41 (10.8) 50 (84.7) 9 (15.3)
   8 days or more 560 (87.6) 79 (12.4) 124 (81.0) 29 (19.0)
Average sleeping hours for days not working overnight
   Less than 5 hours 216 (82.1) 47 (17.9) 65 (78.3) 18 (21.7)
   5 to less than 6 hours 892 (91.3) 85 (8.7) 256 (88.3) 34 (11.7)
   6 to less than 7 hours 1300 (93.5) 90 (6.5) 338 (92.3) 28 (7.7)
   7 hours or more 365 (92.4) 30 (7.6) 90 (91.8) 8 (8.2)
The number of days of overnight work per month
   None 1178 (93.4) 83 (6.6) 440 (91.7) 40 (8.3)
   Once 264 (91.7) 24 (8.3) 53 (89.8) 6 (10.2)
   2 to 3 times 540 (90.3) 58 (9.7) 115 (84.6) 21 (15.4)
   4 to 5 times 482 (91.1) 47 (8.9) 87 (89.7) 10 (10.3)
   6 times or more 309 (88.5) 40 (11.5) 54 (83.1) 11 (16.9)