Table 1 Characteristics of cohort members and their mothers at the time of birth and in the last follow-up of each cohort, by sex. The 1982, 1993 and 2004 Pelotas (Brazil) birth cohorts, 2010–2013
2004 cohort | 1993 cohort | 1982 cohort | ||||
|---|---|---|---|---|---|---|
6 years | 18 years | 30 years | ||||
Male | Female | Male | Female | Male | Female | |
Past categorical variables (at birth) | N (%) | N (%) | N (%) | N (%) | N (%) | N (%) |
Maternal skin colour | ||||||
White | 1267 (74.2) | 1166 (72.5) | 1519 (77.3) | 1529 (76.7) | 1429 (81.5) | 1538 (83.0) |
Brown/Black | 441 (25.8) | 443 (27.5) | 446 (22.7) | 465 (23.3) | 324 (18.5) | 315 (17.0) |
Maternal schooling (years) | ||||||
0–4 | 254 (15.0) | 241 (15.2) | 517 (26.3) | 536 (26.9) | 558 (31.9) | 595 (32.1) |
5–8 | 697 (41.1) | 680 (42.8) | 940 (47.9) | 947 (47.5) | 766 (43.7) | 782 (42.3) |
≥ 9 | 746 (43.9) | 669 (42.1) | 507 (25.8) | 511 (25.6) | 428 (24.4) | 474 (25.6) |
Maternal BMI (pre-gestational)a | ||||||
Normal | 978 (57.3) | 897 (56.4) | 1480 (77.7) | 1491 (76.2) | 1181 (77.9) | 1201 (76.3) |
Overweight | 486 (28.5) | 446 (28.1) | 325 (17.1) | 366 (18.7) | 266 (17.6) | 297 (18.9) |
Obese | 242 (14.2) | 247 (15.5) | 101 (5.3) | 99 (5.1) | 69 (4.6) | 77 (4.9) |
Financing of delivery | ||||||
Public | 1383 (81.0) | 1311 (81.6) | 1708 (86.9) | 1734 (86.9) | 1611 (91.9) | 1678 (90.6) |
Private | 324 (19.0) | 295 (18.4) | 257 (13.1) | 262 (13.1) | 143 (8.1) | 175 (9.4) |
Birth weight (grams) | ||||||
< 2500 | 123 (7.2) | 159 (9.9) | 148 (7.5) | 209 (10.5) | 103 (5.9) | 156 (8.4) |
≥ 2500 | 1585 (92.8) | 1450 (90.1) | 1817 (92.5) | 1787 (89.5) | 1651 (94.1) | 1696 (91.6) |
Type of delivery | ||||||
Normal | 905 (53.0) | 905 (56.3) | 1353 (68.9) | 1376 (68.9) | 1258 (71.7) | 1348 (72.8) |
C-section | 803 (47.0) | 704 (43.7) | 612 (31.2) | 620 (31.1) | 496 (28.3) | 505 (27.3) |
Current continuous variables | Mean (sd) | Mean (sd) | Mean (sd) | Mean (sd) | Mean (sd) | Mean (sd) |
Fat mass index (kg/m2) | 3.3 (2.3) | 4.2 (2.5) | 4.2 (3.0) | 8.4 (3.6)a | 6.7 (3.2)a | 10.6 (4.3)a |
BMI Z-score | 0.71 (1.5) | 0.66 (1.4) | 0.29 (1.2)a | 0.45 (1.2)a | 0.03 (0.9)a | −0.02 (1.1)a |
Height (cm) | 121.6 (5.6) | 120.3 (5.6) | 173.8 (6.9) | 161.0 (6.4) | 174.4 (6.9) | 161.4 (6.2) |
All | 1708 (51.5) | 1609 (48.5) | 1965 (49.6) | 1996 (50.4) | 1754 (48.6) | 1853 (51.4) |