Table 1 Characteristics of the study population stratified by baseline survey and days per week of adolescent sport and exercise participation
Characteristic | All | Young-HUNT1 | Young-HUNT3 | Sport and exercise participation (days/week) | ||||
|---|---|---|---|---|---|---|---|---|
< 1 day | 1 day | 2–3 days | 4–6 days | Every day | ||||
No. (%) | 4603 (100) | 2594 (56.4) | 2009 (43.7) | 673 (14.6) | 645 (14.0) | 1790 (38.9) | 1138 (24.7) | 357 (7.8) |
Sex | ||||||||
Male, no. (%) | 1968 (42.8) | 1119 (56.0) | 849 (44.0) | 289 (14.7) | 247 (12.6) | 705 (35.8) | 512 (26.0) | 215 (10.9) |
Female, no. (%) | 2635 (57.3) | 1475 (56.9) | 1160 (43.1) | 384 (14.6) | 398 (15.1) | 1085 (41.2) | 626 (23.8) | 142 (5.4) |
Age | ||||||||
At baseline, mean (SD), years | 16.1 (1.8) | 16.2 (1.8) | 15.9 (1.8) | 16.6 (1.8) | 16.4 (1.8) | 15.9 (1.8) | 15.9 (1.8) | 16.0 (1.8) |
At follow-up, mean (SD), years | 33.0 (5.9) | 37.9 (1.9) | 26.7 (1.9) | 34.2 (5.7) | 33.9 (5.7) | 33.3 (5.7) | 32.0 (6.0) | 31.1 (6.0) |
Body mass index | ||||||||
At baseline*, mean (SD), kg/m2 | 21.6 (3.3) | 21.3 (3.0) | 22.1 (3.5) | 21.8 (3.8) | 22.2 (3.6) | 21.7 (3.6) | 21.6 (3.1) | 21.4 (2.8) |
At follow up, mean (SD), kg/m2 | 26.1 (4.8) | 26.6 (4.7) | 25.6 (4.9) | 27.1 (5.2) | 26.9 (5.2) | 26.3 (5.1) | 25.8 (4.5) | 25.7 (4.9) |
Parental educational level | ||||||||
Primary school, no. (%) | 297 (6.5) | 194 (65.3) | 103 (34.7) | 60 (20.2) | 43 (14.5) | 119 (40.1) | 53 (17.9) | 22 (7.4) |
High school, no. (%) | 2644 (57.4) | 1589 (60.1) | 1055 (39.9) | 422 (16.0) | 400 (15.1) | 1056 (40.0) | 595 (22.5) | 171 (6.5) |
University, no. (%) | 1662 (36.0) | 811 (48.8) | 851 (51.2) | 191 (11.5) | 202 (12.2) | 615 (37.0) | 490 (29.5) | 164 (9.9) |