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Table 1 General characteristics and depressive symptoms

From: Effect of long working hours and insomnia on depressive symptoms among employees of Chinese internet companies

Characteristics Total
N(%)
Depressive symptoms
Negative
n(%)
Positive
n(%)
p-value
Total   3589 (100.0) 2175 (60.6) 1414 (39.4)  
Age group 16–25 625 (17.4) 421 (67.4) 204 (32.6) < 0.001
26–30 954 (26.6) 665 (69.7) 289 (30.3)  
31–35 753 (21.0) 478 (63.5) 275 (36.5)  
36–40 507 (14.1) 275 (54.2) 232 (45.8)  
≥41 750 (20.9) 387 (51.6) 363 (48.4)  
Sex Male 2022 (56.3) 1267 (62.7) 755 (37.3) 0.371
Female 1567 (43.7) 959 (61.2) 608 (38.8)  
Education High school 344 (9.6) 209 (60.8) 135 (39.2) < 0.001
Junior college 521 (14.5) 280 (53.7) 241 (46.3)  
College 2009 (56.0) 1242 (61.8) 767 (38.2)  
Graduate school 715 (19.9) 495 (69.2) 220 (30.8)  
Marital status Married 2363 (65.8) 1401 (59.3) 962 (40.7) < 0.001
Single 1159 (32.3) 794 (68.5) 365 (31.5)  
Separated/divorced/widowed 67 (1.9) 31 (46.3) 36 (53.7)  
Income(¥) ≤4999 1319 (36.8) 717 (54.4) 602 (45.6) < 0.001
5000–7999 1105 (30.8) 690 (62.4) 415 (37.6)  
8000–11,999 767 (21.4) 534 (69.6) 233 (30.4)  
≥12,000 398 (11.1) 285 (71.6) 113 (28.4)  
Exercise Never 527 (14.7) 278 (52.8) 249 (47.2) < 0.001
1–3 times/month 1626 (45.3) 1003 (61.7) 623 (38.3)  
1–2 times/week 927 (25.8) 598 (64.5) 329 (35.5)  
≥3 times /week 509 (14.2) 347 (68.2) 162 (31.8)  
Dietary habits Regular 2069 (57.6) 1406 (68.0) 663 (32.0) < 0.001
Occasionally irregular 968 (27.0) 579 (59.8) 389 (40.2)  
Often irregular 440 (12.3) 193 (43.9) 247 (56.1)  
Totally irregular 112 (3.1) 48 (42.9) 64 (57.1)  
Smoking status Nonsmoker 2701 (75.3) 1725 (63.9) 976 (36.1) < 0.001
Former smoker 287 (8.0) 153 (53.3) 134 (46.7)  
Current smoker 601 (16.7) 348 (57.9) 253 (42.1)  
Work time ≤40 h/week 1147 (32.0) 752 (65.6) 395 (34.4) < 0.001
41–50 h/week 1641 (45.7) 982 (59.8) 659 (40.2)  
51–60 h/week 420 (11.7) 244 (58. 1) 176 (41.9)  
> 60 h/week 381 (10.6) 197 (51.7) 184 (48.3)  
Insomnia Negative 2091 (58.3) 1481 (70.8) 610 (29.2) < 0.001
Positive 1498 (41.7) 694 (46.3) 804 (53.7)