Table 3. Adolescent hormone levels by birth size among 262 Norwegian girls.
|
Geometric meana (95 % CI)
|
|||
|---|---|---|---|
| Variables | No. of girls | Prolactin (mIU l−1) | DHEAS (μmol l−1) |
| Birth length (cm) | |||
| <49.0 | 84 | 179.9 (162.1–199.6) | 2.28 (1.88–2.78) |
| 49.0–51.0 | 84 | 206.1 (186.9–227.3) | 2.09 (1.73–2.51) |
| ⩾51.0 | 91 | 176.8 (161.1–193.9) | 1.95 (1.64–2.32) |
| Trend testb | eβ=0.99, P=0.74 | eβ=0.92, P=0.21 | |
| Birth weight (g) | |||
| <3200 | 80 | 184.6 (165.7–205.6) | 2.51 (2.06–3.05) |
| 3200–3700 | 101 | 188.7 (171.8–207.3) | 2.08 (1.75–2.46) |
| ⩾3700 | 81 | 186.6 (168.6–206.5) | 1.83 (1.52–2.20) |
| Trend testb | eβ=1.01, P=0.88 | eβ=0.85, P=0.015 | |
| Ponderal index (g cm−3) | |||
| <2.63 | 83 | 180.5 (163.3–199.6) | 2.25 (1.86–2.71) |
| 2.63–2.85 | 93 | 197.6 (179.8–217.2) | 2.16 (1.81–2.58) |
| ⩾2.85 | 83 | 181.7 (164.1–201.2) | 1.84 (1.52–2.23) |
| Trend testb | eβ=1.00, P=0.90 | eβ=0.91, P=0.13 | |
| Head circumference (cm) | |||
| <34.2 | 86 | 195.5 (176.2–216.9) | 2.47 (2.03–2.99) |
| 34.2–35.4 | 92 | 188.4 (171.5–207.1) | 2.03 (1.70–2.42) |
| ⩾35.4 | 82 | 175.7 (159.3–193.9) | 1.92 (1.60–2.30) |
| Trend testb | eβ=0.95, P=0.12 | eβ=0.88, P=0.047 | |
| Skin-fold thickness (mm) | |||
| <3.8 | 88 | 194.7 (175.6–215.9) | 2.41 (2.00–2.91) |
| 3.8–4.8 | 88 | 181.8 (164.7–200.6) | 2.19 (1.83–2.62) |
| ⩾4.8 | 83 | 185.5 (167.2–205.8) | 1.73 (1.43–2.09) |
| Trend testb | eβ=0.98, P=0.48 | eβ=0.85, P=0.012 | |
CI=confidence interval; DHEAS=dehydroepiandrosterone sulphate.
a
Adjusted for age at puberty, menarche status and region.
b
eβ × 100% equals percent change in hormone levels with increasing birth size category and corresponding P-value.