Table 2. Multivariate-adjusted means and 95% confidence intervals for height, weight, and body mass index in Chinese children aged 3–6 years, by birth weight^a .

Birth weight (kg)	Height (cm)	Weight (kg)	Body mass index (kg/m2)
<2.50	103.3 (103.1–103.6)	16.5 (16.4–16.6)	15.37 (15.30–15.44)
2.50–	103.7 (103.5–103.9)	16.7 (16.6–16.8)	15.45 (15.38–15.51)
2.75–	103.9 (103.7–104.1)	16.8 (16.7–16.9)	15.49 (15.43–15.55)
3.00–	104.3 (104.1–104.5)	17.0 (16.9–17.1)	15.55 (15.49–15.61)
3.25–	104.5 (104.3–104.7)	17.1 (17.0–17.2)	15.60 (15.54–15.66)
3.50–	104.8 (104.6–105.0)	17.3 (17.2–17.3)	15.64 (15.58–15.70)
3.75–	105.2 (105.0–105.4)	17.5 (17.4–17.5)	15.71 (15.65–15.77)
4.00–	105.2 (105.0–105.5)	17.6 (17.5–17.7)	15.80 (15.74–15.87)
4.25+	105.5 (105.3–105.9)	17.8 (17.7–17.9)	15.90 (15.82–15.97)
P for linear trend	<0.001	<0.001	<0.001

^aThe model includes residence area (northern/southern); child’s sex (male/female); child’s age at follow-up (40–41, 42–47, 48–53, 54–59, 60–65, 66–71, 72–77, 78–79 months); maternal age at delivery (<22, 22–24, 25–27, 28–30, 31–34, ≥35 years); occupation (farmer/non-farmer); education (high school or above, middle school, primary school or below); folic acid supplementation before or during pregnancy, primiparous (yes/no); child’s gestational age at birth (<37, 37–39, 40–41, ≥42 weeks); child’s body length at birth (<P₅ (43.0), P₅ to <P₅₀ (50.0), P₅₀ to <P₉₅ (52.0), ≥P₉₅ cm); pregnancy-induced hypertension (yes/no); maternal weight gain during pregnancy (<P₂₅ (8.0), P₂₅ to <P₅₀ (11.0), P₅₀ to <P₇₅ (14.0), ≥P₇₅ kg); maternal height (<P₅ (1.51), P₅ to <P₂₅ (1.56), P₂₅ to <P₅₀ (1.59), P₅₀ to <P₇₅ (1.61), P₇₅ to <P₉₅ (1.66), ≥P₉₅ cm); and weight at first prenatal visit during pregnancy (<P₅ (43.0), P₅ to <P₂₅ (48.0), P₂₅ to <P₅₀ (52.0), P₅₀ to <P₇₅ (56.0), P₇₅ to <P₉₅ (63.0), ≥P₉₅ kg).