Table 1 Distribution of participants according to the applied variables by gender
Total study population | Boys | Girls | |
|---|---|---|---|
(N = 2100) | N = 1031 | N = 1069 | |
n (%) | n (%) | n (%) | |
Age | |||
11 years | 755 (36.0) | 366 (35.5) | 389 (36.4) |
13 years | 775 (36.9) | 378 (36.7) | 397 (37.1) |
15 year | 570 (27.1) | 287 (27.8) | 283 (26.5) |
Last weighed… | |||
Within past week | 707 (33.7) | 315 (30.6) | 392 (36.7)* |
Within past month | 725 (34.5) | 351 (34.0) | 374 (35.0) |
Within past half year | 354 (16.9) | 199 (19.3) | 155 (14.5) |
Since longer | 86 (4.1) | 45 (4.4) | 41 (3.8) |
Cannot remember | 200 (9.5) | 105 (10.2) | 95 (8.9) |
Missing | 28 (1.3) | 16 (1.6) | 12 (1.1) |
Last height measured… | |||
Within past week | 315 (15.0) | 171 (16.6) | 144 (13.5) |
Within past month | 634 (30.2) | 304 (29.5) | 330 (30.9) |
Within past half year | 678 (32.3) | 331 (32.1) | 347 (32.5) |
Since longer | 205 (9.8) | 91 (8.8) | 114 (10.7) |
Cannot remember | 246 (11.7) | 122 (11.8) | 124 (11.6) |
Missing | 22 (1.1) | 12 (1.2) | 10 (0.9) |
Can remember weight… | |||
Exactly | 540 (25.7) | 272 (26.4) | 268 (25.1) |
Approximately | 1147 (54.6) | 556 (53.9) | 591 (55.3) |
Not very well | 246 (11.7) | 115 (11.2) | 131 (12.3) |
Don’t remember | 133 (6.3) | 72 (7.0) | 61 (5.7) |
Missing | 34 (1.6) | 16 (1.6) | 18 (1.7) |
Can remember height… | |||
Exactly | 489 (23.3) | 224 (21.7) | 265 (24.8)* |
Approximately | 1185 (56.4) | 587 (56.9) | 598 (55.9) |
Not very well | 271 (12.9) | 127 (12.3) | 144 (13.5) |
Don’t remember | 132 (6.3) | 82 (8.0) | 50 (4.7) |
Missing | 23 (1.1) | 11 (1.1) | 12 (1.1) |
Response capability for weight | |||
Weighed recently + high recall ability | 1317 (62.7) | 617 (59.8) | 700 (65.5)* |
Weighed recently + low recall ability | 109 (5.2) | 47 (4.6) | 62 (5.8) |
Not weighed recently + high recall ability | 367 (17.5) | 209 (20.3) | 158 (14.8) |
Not weighed recently + low recall ability | 269 (12.8) | 140 (13.6) | 129 (12.1) |
Missing | 38 (1.8) | 18 (1.8) | 20 (1.9) |
Response capability for height | |||
Measured recently + high recall ability | 1420 (67.6) | 698 (67.7) | 772 (67.5) |
Measured recently + low recall ability | 203 (9.7) | 107 (10.4) | 96 (9.0) |
Not measured recently + high recall ability | 251 (12.0) | 112 (10.9) | 139 (13.0) |
Not measured recently + low recall ability | 198 (9.4) | 101 (9.8) | 97 (9.1) |
Missing | 28 (1.3) | 13 (1.3) | 15 (1.4) |
Response capability combined for height and weight | |||
High | 1023 (48.7) | 491 (47.6) | 532 (49.8) |
Low | 1026 (48.9) | 517 (50.2) | 509 (47.6) |
Missing | 51 (2.4) | 23 (2.2) | 28 (2.6) |
Family occupational social class | |||
High | 902 (43.0) | 449 (43.6) | 453 (42.4)* |
Middle | 559 (26.6) | 264 (25.6) | 295 (27.6) |
Low | 304 (14.5) | 131 (12.7) | 173 (16.2) |
Un-classifiable | 297 (14.1) | 166 (16.1) | 131 (12.3) |
Missing | 38 (1.8) | 21 (2.0) | 17 (1.6) |
Family structure | |||
Traditional family | 1160 (55.2) | 585 (56.7) | 575 (53.8) |
Reconstructed family | 191 (9.1) | 80 (7.8) | 111 (10.4) |
Single-parent family | 422 (20.1) | 206 (20.0) | 216 (20.2) |
Other | 15 (0.7) | 5 (0.5) | 10 (0.9) |
Missing | 312 (14.9) | 155 (15.0) | 157 (14.7) |
Migration status | |||
Danish | 1734 (82.6) | 858 (83.2) | 876 (81.9) |
Decendants | 236 (11.2) | 104 (10.1) | 132 (12.4) |
Immigrants | 109 (5.2) | 55 (5.3) | 54 (5.1) |
Missing | 21 (1.0) | 14 (1.4) | 7 (0.7) |