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Table 2 Sociodemographic characteristics of 72,435 adolescents with and without each mental health condition, the Ninth Korean Youth Risk Behavior Survey (2013), N (%)a Urban area: small, medium, or big city

From: Association of atopic dermatitis with depressive symptoms and suicidal behaviors among adolescents in Korea: the 2013 Korean Youth Risk Behavior Survey

Variables Had depression symptoms P-value Suicide ideation P-value Suicide planning P-value Suicide attempt P-value
No Yes No Yes No Yes No Yes
Sex
 Male 27462 (56.6) 9193 (42.7) <0.001 31885 (54.5) 4770 (41.3) <0.001 34900 (52.8) 1755 (43.6) <0.001 35590 (53.0) 1065 (35.8) <0.001
 Female 22543 (43.4) 13237 (57.3)   28480 (45.5) 7300 (58.7) 33367 (47.2) 2413 (56.4)   33824 (47.0) 1956 (64.2)  
Age
 12–14 years (Middle school) 26012 (50.1) 10518 (45.8) <0.001 30186 (48.2) 6344 (51.7) <0.001 34099 (48.2) 2431 (57.6) <0.001 34680 (48.2) 1850 (61.1) <0.001
 15–17 years (High school) 23993 (50.0) 11912 (54.2)   30179 (51.8) 5726 (48.3) 34168 (51.8) 1737 (42.4)   34734 (51.8) 1171 (38.9)  
Residencea
 Rural area 6087 (6.8) 2771 (7.1) <0.001 7428 (6.9) 1430 (6.8) 0.796 8327 (6.9) 531 (7.4) 0.307 8500 (6.9) 358 (6.9) 0.990
 Urban area 43918 (93.2) 19659 (92.9)   52937 (93.1) 10640 (93.2) 59940 (93.1) 3637 (92.6)   60914 (93.1) 2663 (93.1)  
Family affluenceb
 Low 5720 (11.0) 2821 (12.1) <0.001 6983 (11.1) 1558 (12.2) 0.007 7975 (11.2) 566 (13.0) <0.001 8117 (11.2) 424 (13.7) <0.001
 Middle 26116 (51.7) 11651 (51.6)   31594 (51.8) 6173 (50.7) 35719 (51.8) 2048 (49.0)   36328 (51.9) 1439 (46.9)  
 High 18169 (37.3) 7958 (36.3)   21788 (37.0) 4339 (37.1) 24573 (37.0) 1554 (37.9)   24969 (36.9) 1158 (39.4)  
Father’s educational attainment
 <High school graduation 1814 (3.2) 9614 (45.1) <0.001 2231 (3.3) 520 (3.8) 0.0018 2558 (3.3) 193 (4.1) <0.001 2621 (3.3) 130 (3.9) <0.001
 High school graduation 16385 (31.6) 7550 (32.5)   20063 (32.1) 3872 (31.0)   22720 (32.1) 1215 (28.2)   23023 (32.0) 912 (29.1)  
 >College graduation 21748 (46.1) 937 (3.7)   26172 (45.9) 5190 (45.4)   29603 (45.9) 1759 (44.4)   30155 (46.0) 1207 (42.6)  
 Missinge 10058 (19.1) 4329 (18.6)   11899 (18.8) 2488 (19.7)   13386 (18.7) 1001 (23.3)   13615 (18.7) 772 (24.5)  
Mother’s educational attainment
 <High school graduation 1682 (3.0) 7865 (36.8) <0.001 2063 (3.0) 507 (3.9) <0.001 2400 (3.2) 170 (3.9) <0.001 2459 (3.2) 111 (3.6) <0.001
 High school graduation 20612 (41.1) 9518 (41.9)   25238 (41.6) 4892 (40.0) 28573 (41.6) 1557 (37.1)   29013 (41.5) 1117 (36.7)  
 >College graduation 17910 (37.7) 888 (3.7)   21515 (37.4) 4260 (37.3) 24304 (37.4) 1471 (37.1)   24765 (37.5) 1010 (35.4)  
 Missinge 9801 (18.3) 4159 (17.7)   11549 (18.0) 2411 (18.8) 12990 (17.9) 970 (21.8)   13177 (17.9) 783 (24.2)  
Participation in physical activityc
 Do not 11719 (23.5) 5474 (24.5) <0.001 14213 (23.7) 2980 (24.3) 0.165 16244 (23.8) 949 (22.6) 0.1554 16511 (23.8) 682 (22.7) 0.224
 Do ≥ 1 per week 38286 (76.5) 16956 (75.5)   46152 (76.3) 9090 (75.7) 52023 (76.2) 3219 (77.4)   52903 (76.2) 2339 (77.3)  
Cigarette smoking
 Non-smoker 46152 (92.3) 19189 (85.7) <0.001 55207 (91.4) 10134 (84.4) <0.001 62009 (90.8) 3332 (80.4) <0.001 63004 (90.8) 2337 (78.2) <0.001
 <10 /day 3176 (6.4) 2503 (11.1)   4211 (7.0) 1468 (11.9)   5095 (7.5) 584 (13.5)   5218 (7.5) 461 (14.6)  
 ≥10 /day 677 (1.3) 738 (3.2)   947 (1.6) 468 (3.7)   1163 (1.7) 252 (6.2)   1192 (1.7) 223 (7.3)  
Alcohol consumption
 Non-drinker 43211 (86.6) 17258 (77.4) <0.001 51392 (85.3) 9077 (75.7) <0.001 57484 (84.5) 2985 (72.2) <0.001 58376 (84.3) 2093 (69.9) <0.001
 Drinker 4483 (9.0) 2533 (11.3)   5583 (9.2) 1433 (12.1)   6512 (9.5) 504 (12.3)   6652 (9.6) 364 (12.3)  
 Individuals with problem drinkingd 2311 (4.4) 2639 (11.3)   3390 (5.5) 1560 (12.2)   4271 (6.0) 679 (15.5)   4386 (6.1) 564 (17.8)  
Sleep duration
 <5 h 10124 (20.0) 5595 (24.6) <0.001 12481 (20.3) 3238 (26.8) <0.001 14415 (20.8) 1304 (31.5) <0.001 14725 (20.9) 994 (33.4) <0.001
 5~7 h 17719 (36.7) 8394 (38.0)   21807 (37.3) 4306 (35.9)   24822 (37.5) 1291 (31.1)   25191 (37.4) 922 (30.5)  
 7 h< 17770 (34.2) 5714 (24.8)   20376 (32.5) 3108 (25.3)   22367 (31.6) 1117 (26.2)   22702 (31.5) 782 (25.3)  
 Missinge 4392 (9.2) 2727 (12.6)   5701 (9.9) 1418 (12.1)   6663 (10.2) 456 (11.2)   6796 (10.2) 323 (10.8)  
Sleep satisfaction
 Well enough 14818 (29.4) 3727 (16.8) <0.001 16662 (27.5) 1883 (15.9) <0.001 17817 (26.0) 728 (17.7) <0.001 18050 (25.9) 495 (17.2) <0.001
 Enough 16788 (33.6) 6445 (28.9)   20035 (33.3) 3198 (26.6)   22202 (32.6) 1031 (25.2)   22487 (32.5) 746 (24.4)  
 Not enough 18399 (37.0) 12258 (54.3)   23668 (39.3) 6989 (57.6)   28248 (41.4) 2409 (57.1)   28877 (41.6) 1780 (58.4)  
Violence
 Never experienced 48927 (97.9) 21068 (94.0) <0.001 58900 (97.6) 11095 (92.1) <0.001 66417 (97.3) 3578 (85.7) <0.001 67456 (97.2) 2539 (83.9) <0.001
 Experienced ≥1 time 1078 (2.1) 1362 (6.0)   1465 (2.4) 975 (7.9)   1850 (2.7) 590 (14.3)   1958 (2.8) 482 (16.1)  
  1. a Urban area: small, medium, or big city
  2. b Family Affluence Score = number of cars + holidays + personal computers + bedrooms. 0–2: Low, 3–5: Middle, >6: High
  3. c An activity such as jogging, playing sports over 20 min causing rapid breathing and a substantial increase in heart rate
  4. d Those who experienced problem drinking during the last 12 months
  5. e Those who did not answer