Table 2. Adolescent anthropometric measures and age at menarche by birth size among 262 Norwegian girls.

		Meana (95% CI)		Median (95% CI)
Variables	No. of girls	Height (cm)	Weight (kg)	Age at menarche (years)
Birth length (cm)
<49.0	84	158.4 (157.0–159.7)	50.8 (48.6–53.0)	12.50 (12.26–12.74)
49.0–51.0	84	160.8 (159.5–162.1)	51.7 (49.6–53.8)	13.08 (12.94–13.22)
⩾51.0	91	164.6 (163.4–165.8)	55.0 (53.1–56.9)	13.33 (12.95–13.72)
Trend testb		β=3.13, P<0.001	β=2.12, P=0.003	P<0.001
Birth weight (g)
<3200	80	159.9 (158.5–161.4)	51.8 (49.6–53.9)	12.58 (12.32–12.84)
3200–3700	101	160.4 (159.2–161.7)	50.0 (48.1–51.9)	13.25 (12.94–13.56)
⩾3700	81	164.3 (162.9–165.6)	56.5 (54.5–58.5)	13.33 (12.97–13.70)
Trend testb		β=2.16, P<0.001	β=2.37, P=0.001	P=0.001
Ponderal index (g cm−3)
<2.63	83	162.4 (160.9–163.8)	52.7 (50.5–54.8)	12.83 (12.53–13.14)
2.63–2.85	93	161.8 (160.4–163.2)	52.0 (50.0–54.1)	13.08 (12.82–13.35)
⩾2.85	83	160.8 (159.3–162.2)	53.6 (51.5–55.8)	13.17 (12.68–13.65)
Trend testb		β=−0.81, P=0.098	β=0.47, P=0.52	P=0.099
Head circumference (cm)
<34.2	86	160.5 (159.0–161.9)	51.9 (49.8–54.0)	12.83 (12.42–13.25)
34.2–35.4	92	160.8 (159.5–162.1)	51.0 (49.0–52.9)	13.42 (13.03–13.81)
⩾35.4	82	163.4 (162.0–164.8)	55.2 (53.2–57.3)	13.17 (12.62–13.71)
Trend testb		β=1.45, P=0.003	β=1.66, P=0.020	P=0.003
Skin-fold thickness (mm)
<3.8	88	161.5 (160.0–162.9)	52.2 (50.1–54.4)	12.83 (12.53–13.13)
3.8–4.8	88	161.3 (159.9–162.7)	52.5 (50.4–54.5)	12.92 (12.46–13.37)
⩾4.8	83	161.9 (160.4–163.3)	53.2 (51.1–55.3)	13.50 (13.07–13.93)
Trend testb		β=0.18, P=0.72	β=0.50, P=0.49	P=0.001

CI=confidence interval.

^aAdjusted for age at puberty, menarche status and region.

^bRegression coefficient, β, denoting increase in adolescent size measure with increasing birth size category and corresponding P-value.