Table 1.
Age-Specific Reference Intervals of Serum Calcium Concentrations in Milligrams Per Deciliter
| Age Range | Values Eliminating Patients on the Renal Unit or Endocrine Unit as Well as ICU (NICU, PICU and CICU) Patients |
Values for Subjects From All Units With All 25(OH)D | Values for All Subjects (With Or Without 25(OH)D Concentrations) | ||
|---|---|---|---|---|---|
| 25(OH)D >30 and <80 (75–200 nmol/L ) | 25(OH)D Between 20 and 80 (50–200 nmol/L) | 25(OH)D Between 20 and 30 (50–75 nmol/L) | |||
| Birth to 90 d | 8.0–11.3, n = 78 (2.0–2.8 mmol/L) | 7.8–11.3, n = 110 (2.0–2.8 mmol/L) | 7.5–11.1, n = 32 (1.9–2.8 mmol/L) | 7.5–11.6, n = 140 (1.9–2.9 mmol/L) | 7.1–11.1, n = 14,659 (1.8–2.8 mmol/L) |
| 91–180 d | 8.9–11.2, n = 96 (2.2–2.8 mmol/L) | 8.8–11.2, n = 124 (2.2–2.8 mmol/L) | 8.6–10.9, n = 28 (2.2–2.7 mmol/L) | 8.5–11.2, n = 164 (2.1–2.8 mmol/L) | 7.6–11.0, n = 5657 (1.9–2.8 mmol/L) |
| 181–364 d | 9.0–11.3, n = 163 (2.3–2.8 mmol/L) | 8.8–11.4, n = 192 (2.2–2.9 mmol/L) | 8.1–11.3, n = 29 (2.0–2.8 mmol/L) | 8.2–11.6, n = 231 (2.1–2.9 mmol/L) | 7.3–10.9, n = 5952 (1.8–2.7 mmol/L) |
| 1–3 y | 8.9–11.1, n = 568 (2.2–2.8 mmol/L) | 8.8–11.1, n = 756 (2.2–2.8 mmol/L) | 8.5–11.0, n = 188 (2.1–2.8 mmol/L) | 8.6–10.8, n = 832 (2.2–2.7 mmol/L) | 7.6–10.5, n = 16708 (1.9–2.6 mmol/L) |
| 4–11 y | 8.7–10.7, n = 962 (2.2–2.7 mmol/L) | 8.8–10.7, n = 1440 (2.2–2.7 mmol/L) | 8.6–10.7, n = 478 (2.2–2.7 mmol/L) | 8.4–10.6, n = 2186 (2.1–2.7 mmol/L) | 7.5–10.4, n = 27102 (1.9–2.6 mmol/L) |
| 12–19 y | 8.5–10.7, n = 943 (2.1–2.7 mmol/L) | 8.5–10.6, n = 1716 (2.1–2.7 mmol/L) | 8.5–10.5, n = 773 (2.1–2.6 mmol/L) | 8.2–10.5, n = 2788 (2.1–2.6 mmol/L) | 7.3–10.2, n = 30909 (1.8–2.6 mmol/L) |
| >19 y | 8.5–10.5, n = 195 (2.2–2.6 mmol/L) | 8.5–10.5, n = 27 (2.1–2.6 mmol/L) | 8.4–10.4, n = 92 (2.1–2.6 mmol/L) | 8.2–10.3, n = 526 (2.1–2.6 mmol/L) | 7.2–10.2, n = 5223 (1.8–2.6 mmol/L) |
| Birth to 19 y | 8.6–10.9, n = 2810 (2.2–2.7 mmol/L) | 8.6–10.9, n = 4338 (2.2–2.7 mmol/L) | 8.5–10.7, n = 1528 (2.1–2.7 mmol/L) | 8.3–10.7, n = 6341 (2.1–2.7 mmol/L) | |
| All ages | 8.6–10.9, n = 3008 (2.2–2.7 mmol/L) | 8.8–10.8, n = 4629 (2.2–2.7 mmol/L) | 8.5–10.7, n = 1621 (2.1–2.7 mmol/L) | 8.2–10.7, n = 6867 (2.1–2.7 mmol/L) | 7.4–10.6, n = 106220 (1.9–2.7 mmol/L) |
Abbreviation: NICU, neonatal intensive care unit; PICU, pediatric intensive care unit. Values include interval, n, below in parentheses (in nanomoles per liter).