Table 1.
Characteristicsa of the study participants by country
| Characteristic | Brazil | Chile | Spain |
|---|---|---|---|
| Total | 571 (100.0) | 772 (100.0) | 487 (100.0) |
| Age (years) | |||
| Mean ± SD | 20.5 ± 4.3 | 19.4 ± 2.2 | 20.3 ± 4.5 |
| Sex | |||
| Female | 372 (65.1) | 385 (49.9) | 370 (76.0) |
| Male | 199 (34.9) | 387 (50.1) | 117 (24.0) |
| Parental highest level of educationb | |||
| Lower than university studies | 304 (53.2) | 442 (69.0) | NA |
| University studies | 267 (46.8) | 198 (31.0) | NA |
| Body mass index (Kg/m2) | |||
| ≤ 24.9 | 345 (60.4) | 482 (62.4) | 394 (80.9) |
| ≥ 25.0 | 226 (39.6) | 290 (37.6) | 93 (19.1) |
| Mean ± SD | 23.7 ± 4.6 | 24.5 ± 4.6 | 22.6 ± 3.6 |
| Free-time physical activity | |||
| Lower level | 396 (69.4) | 496 (64.3) | 320 (65.7) |
| Higher level | 175 (30.6) | 276 (35.7) | 167 (34.3) |
| Tobacco consumption | |||
| Yes | 170 (29.8) | 182 (23.6) | 142 (29.2) |
| No | 401 (70.2) | 590 (76.4) | 345 (70.8) |
| Alcohol consumption | |||
| Yes | 444 (77.8) | 536 (69.4) | 445 (91.4) |
| No | 127 (22.2) | 236 (30.6) | 42 (8.6) |
| Frequency of alcohol consumption | |||
| Yes, frequently | 202 (35.4) | 61 (7.9) | 117 (24.1) |
| Yes, occasionally | 111 (19.4) | 475 (61.5) | 196 (40.2) |
| Abstemious or almost never | 258 (45.2) | 236 (30.6) | 174 (35.7) |
| Risk of alcohol-related problems | |||
| High | 11 (1.9) | 104 (13.5) | 66 (13.6) |
| Intermediate | 133 (23.3) | 207 (26.8) | 120 (24.6) |
| Low | 427 (74.8) | 461 (59.7) | 301 (61.8) |
| Self-rated health | |||
| Optimal | 135 (23.6) | 429 (55.6) | 437 (89.7) |
| Suboptimal | 436 (76.4) | 343 (44.4) | 50 (10.3) |
| Sleep duration (hours) | |||
| < 7 | 287 (50.3) | 144 (18.7) | 124 (25.5) |
| 7–8 | 257 (45.0) | 522 (67.6) | 314 (64.5) |
| > 8 | 27 (4.7) | 106 (13.7) | 49 (10.0) |
| Mean ± SD | 7.0 ± 1.2 | 7.4 ± 1.2 | 7.2 ± 1.1 |
| Sleep quality | |||
| Optimal | 323 (56.6) | 451 (58.4) | 378 (77.6) |
| Suboptimal | 248 (43.4) | 321 (41.6) | 109 (22.4) |
NA not available, SD standard deviation
aValues are the number and % of individuals in each category, except when indicated mean ± standard deviation (SD)
bData available for 640 (82.9%) students in Chile