Table 1 Characteristics of the female population in the 1982 (N: 1637) and 1993 (N: 2033) Pelotas birth cohorts, Brazilc
Variables | Age at Menarche (years) | |||||
|---|---|---|---|---|---|---|
≤11 | 12–13 | ≥14 | ≤11 | 12–13 | ≥14 | |
1982 | 1993 | |||||
N (%) or Mean (SD) | ||||||
Gestational age (w)a | ||||||
≤37 | 35 (10.9) | 96 (13.6) | 39 (14.1) | 71 (14.3) | 158 (17.1) | 71 (20.3) |
38–39 | 125 (39.1) | 272 (38.4) | 97 (35.2) | 177 (35.6) | 307 (33.2) | 109 (31.1) |
≥40 | 160 (50.0) | 340 (48.0) | 140 (50.7) | 249 (50.1) | 459 (49.7) | 170 (48.6) |
Birth weight (g)a | ||||||
<2500 | 37 (9.2) | 75 (8.6) | 27 (7.5) | 58 (10.6) | 103 (10.0) | 57 (14.0) |
2500–2999 | 118 (29.2) | 263 (30.1) | 111 (31.0) | 140 (25.4) | 322 (31.1) | 120 (29.4) |
3000–3499 | 145 (35.9) | 316 (36.2) | 138 (38.6) | 236 (42.9) | 380 (36.7) | 157 (38.5) |
≥3500 | 104 (25.7) | 220 (25.1) | 82 (22.9) | 116 (21.0) | 230 (22.2) | 74 (18.1) |
Skin colora | ||||||
White | 290 (71.6) | 666 (76.2) | 275 (76.8) | 355 (65.9) | 653 (64.9) | 264 (65.5) |
Non-white | 115 (28.4) | 208 (23.8) | 83 (23.2) | 184 (34.1) | 353 (35.1) | 139 (34.5) |
WH z-score at 4 yb | 0.70 (0.99) | 0.47 (0.95) | 0.38 (0.92) | - | - | - |
BMI z-score at 11 yb | - | - | - | 0.74 (1.08) | 0.24 (1.20) | −0.26 (1.22) |
Age at Menarche (y)a | 405 (24.7) | 874 (53.4) | 358 (21.9) | 550 (27.6) | 1037 (52.0) | 408 (20.5) |
Age at Menarche (y)b | 10.5 (0.8) | 12.4 (0.5) | 14.5 (0.8) | 10.6 (0.7) | 12.4 (0.5) | 14.4 (0.7) |
BMI (kg/m2)a | ||||||
<25 | 123 (30.6) | 440 (50.6) | 202 (56.4) | 347 (63.1) | 732 (70.7) | 336 (82.4) |
25–29.9 | 129 (32.1) | 250 (28.7) | 87 (24.3) | 117 (21.3) | 199 (19.2) | 60 (14.7) |
≥30 | 150 (37.3) | 180 (20.7) | 69 (19.3) | 86 (15.6) | 104 (10.1) | 12 (2.9) |
WC (cm)b | 84.8 (12.9) | 79.9 (11.6) | 78.4 (11.3) | 76.0 (10.7) | 73.7 (9.6) | 70.9 (7.9) |
AVFLT (cm)b | 5.29 (1.91) | 4.87 (1.65) | 4.74 (1.41) | - | - | - |
FMI (kg/m2)b | 12.5 (4.7) | 10.3 (4.1) | 9.7 (4.2) | 9.4 (3.8) | 8.4 (3.5) | 7.2 (3.0) |
FFMI (kg/m2)b | 16.4 (2.2) | 15.7 (1.7) | 15.6 (1.7) | 15.1 (1.5) | 15.0 (1.5) | 14.8 (1.3) |