Table 1 Description of the study population
Variables | i-Share (France) n = 5655 | Kyoto (Japan) n = 17,148 | P value |
|---|---|---|---|
PHQ-2, n (%) | |||
 Low depressive symptoms [0–2] | 4355 (77.0) | 16,555 (96.5) | < 0.001 |
 High depressive symptoms [3–6] | 1300 (23.0) | 593 (3.5) | |
Self-rated health, n (%) | |||
 Good | 5499 (97.2) | 16,378 (95.5) | < 0.001 |
 Poor | 156 (2.8) | 770 (4.5) | |
Sex, n (%) | |||
 Female | 4457 (78.8) | 4193 (24.5) | < 0.001 |
 Male | 1198 (21.1) | 12,955 (75.5) | |
Age, mean (SD) | 20.8 (2.6) | 22.4 (4.4) | < 0.001 |
Year of study, n (%) | |||
 1st undergraduate | 2214 (39.2) | 2698 (15.7) | < 0.001 |
 Other years | 3441 (60.8) | 14,450 (84.3) | |
Sleep, n (%) | |||
 Good | 4478 (79.2) | 12,740 (74.3) | < 0.001 |
 Bad | 1177 (20.8) | 4408 (25.7) | |
BMIa, n (%) | |||
 < 18.5 | 729 (12.9) | 2290 (13.3) | < 0.001 |
 [18.5-24.9] | 4030 (71.3) | 13,232 (77.2) | |
 [25–29.9] | 471 (8.3) | 1381 (8.1) | |
 > = 30 | 120 (2.1) | 245 (1.4) | |
Physical activity, n (%) | |||
 Regular | 4950 (87.5) | 11,435 (66.7) | < 0.001 |
 Occasional or less | 705 (12.5) | 5713 (33.3) | |
Smoking, n (%) | |||
 No | 4245 (75.1) | 16,677 (97.3) | < 0.001 |
 Yes | 1410 (24.9) | 471 (2.7) | |
Alcohol consumption, n (%) | |||
 Never | 434 (7.7) | 7292 (42.5) | < 0.001 |
 At least sometimes | 5221 (92.3) | 9856 (57.5) | |