Table 2.

Pediatric reference ranges of ZPP blood concentrations (2.5^th–97.5^th percentiles μg/dL) for females and males age 0–17 years

Age Groups	Blood ZPP Reference Ranges 2.5^th–97.5^th percentiles (μg/dL)^*		Blood ZPP Reference Ranges 2.5^th–97.5^th percentiles (μmol/mol heme)		n
Age Groups	Males	Females	Males	Females	Males	Females
0–12 months	8.5–34.5	9–40	15.6–63.5	16.6–73.6	145	203
13–24 months	10–34	11–32	18.4–62.6	20.2–58.9	605	725
2–5 years	5–35	10–31	9.2–64.4	18.4–57.0	1,926	1,822
6–9 years	6–31	9–30	11.0–57.0	16.6–55.2	522	408
10–17 years	5.5–31.5	5–33.5	10.1–58.0	9.2–61.6	61	61
Total					3,259	3,219

Multiply μg/dL by 1.83 to convert to μmol/mol heme.