Table 1 Characteristics of the sample. The 1993 Pelotas (Brasil) Birth Cohort
Variables | Boys | Girls |
|---|---|---|
n(%) | n(%) | |
Skin color | ||
Black | 1480 (68.2) | 1473 (65.5) |
White | 271 (12.6) | 284 (12.6) |
Brown | 316 (14.5) | 388 (17.2) |
Yellow | 44 (2.0) | 49 (2.2) |
Indigenous | 58 (2.7) | 57 (2.5) |
Asset índex in quintiles | ||
1st (poorest) | 445 (21.1) | 418 (19.2) |
2nd | 414 (19.6) | 437 (20.1) |
3rd | 401 (19.0) | 456 (21.0) |
4rd | 414 (19.6) | 443 (20.4) |
5rd (richest) | 436 (20.7) | 420 (19.3) |
Tanner stage (pubic hair) | ||
1 | 9 (0.5) | 56 (2.7) |
2 | 85 (4.7) | 238 (11.4) |
3 | 374 (20.5) | 811 (38.8) |
4 | 774 (42.3) | 784 (37.5) |
5 | 586 (32.0) | 200 (9.6) |
MVPA 11, 15 and 18y (≥300 min/week) | ||
Has never reached | 112 (6.3) | 474 (24.6) |
Reached once | 391 (21.9) | 741 (38.5) |
Reached twice | 725 (40.5) | 544 (28.3) |
Has always reached | 559 (31.3) | 164 (8.6) |
Physical activity (moderate-intensity)11, 15 and 18y (>150 min/week) | ||
Has never reached | 190 (10.5) | 219 (11.3) |
Reached once | 588 (32.4) | 555 (28.5) |
Reached twice | 702 (38.6) | 712 (36.5) |
Has always reached | 337 (18.5) | 462 (23.7) |
Physical activity (vigorous-intensity) 11, 15 and 18y (>75 min/week) | ||
Has never reached | 184 (10.2) | 1.095 (56.2) |
Reached once | 436 (24.1) | 657 (33.7) |
Reached twice | 696 (38.4) | 173 (8.9) |
Has always reached | 495 (27.3) | 24 (1.2) |
Screen time at 11y (hours/day) in tertiles - Mean (SD) | ||
Upper | 7.7 (2.2) | 7.5 (1.9) |
Middle | 4.3 (0.5) | 4.3 (0.6) |
Bottom | 1.9 (0.9) | 1.9 (0.9) |
Body mass index at 11y in tertiles - Mean (SD) | ||
Upper | 22.6 (3.0) | 22.6 (3.0) |
Middle | 17.7 (0.8) | 17.8 (0.8) |
Bottom | 15.4 (0.8) | 15.2 (1.0) |
Fat mass (kg) - Mean (SD) | 12.8 (9.4) | 21.9 (9.3) |
Lean mass (kg) - Mean (SD) | 54.3 (6.0) | 36.5 (4.4) |
Fat mass index at 18y - Mean (SD) | 4.2 (3.0) | 8.4 (3.6) |
Lean mass index at 18y - Mean (SD) | 18.0 (1.6) | 13.2 (1.4) |