Table 1.
Sample characteristics by ADHD status.
| Variable | Total | No ADHD symptoms | ADHD symptoms | P –value |
|---|---|---|---|---|
| N (%) | N (%) | N (%) | ||
| Sex | 0.622 | |||
| Male | 704 (48.5) | 681 (48.6) | 23 (45.1) | |
| Female | 748 (51.5) | 720 (51.4) | 28 (54.9) | |
| Age | <0.001 | |||
| 18–34 | 322 (22.2) | 293 (20.9) | 29 (56.9) | |
| 35–59 | 572 (39.4) | 557 (39.8) | 15 (29.4) | |
| ≥60 | 558 (38.4) | 551(39.3) | 7 (13.7) | |
| Education | 0.534 | |||
| Higher education | 937 (64.5) | 902 (64.4) | 35 (68.6) | |
| <Higher education | 515 (35.5) | 499 (35.6) | 16 (31.4) | |
| Marital status | <0.001 | |||
| Married | 890 (61.3) | 872 (62.2) | 18 (35.3) | |
| Not married | 562 (38.7) | 529 (37.8) | 33 (64.7) | |
| Household income (Yen) | 0.293 | |||
| <4 million | 415 (28.6) | 399 (28.5) | 16 (31.4) | |
| 4 million to <10 million | 599 (41.3) | 584 (41.7) | 15 (29.4) | |
| ≥10 million | 109 (7.5) | 105 (7.5) | 4 (7.8) | |
| Missing data | 329 (22.7) | 313 (22.3) | 16 (31.4) | |
| Depressive symptoms | <0.001 | |||
| No | 1234 (85.0) | 1224 (87.4) | 10 (19.6) | |
| Yes | 218 (15.0) | 177 (12.6) | 41 (80.4) | |
| Anxiety symptoms | <0.001 | |||
| No | 1295 (89.2) | 1278 (91.2) | 17 (33.3) | |
| Yes | 157 (10.8) | 123 (8.8) | 34 (66.7) | |
| Stress symptoms | <0.001 | |||
| No | 1307 (90.0) | 1287 (91.9) | 20 (39.2) | |
| Yes | 145 (10.0) | 114 (8.1) | 31 (60.8) | |
| Past–year suicidal ideation | <0.001 | |||
| No | 1282 (88.3) | 1257 (89.7) | 25 (49.0) | |
| Yes | 170 (11.7) | 144 (10.3) | 26 (51.0) |
ADHD, attention–deficit/hyperactivity disorder.