Table 1.

Normal serum phosphorus range during childhood

Age	Normal phosphorus range
0–5 days	4.8–8.2 mg/dL
1–3 years	3.8–6.5 mg/dL
4–11 years	3.7–5.6 mg/dL
12–15 years	2.9–5.4 mg/dL
16–19 years	2.7–4.7 mg/dL