Table 2.

An age-related reference interval. A stratification in 9 age groups and a range of PTHrP values at the 2.5–97.5 percentile and 5.0–95.0 percentile, calculated by age group, is reported.

Age Variable	Centiles of PTHrP ng/mL
(Years)	0.025	0.05	0.95	0.975
2	−1.14	−0.69	3.98	4.43
4	−0.21	0.04	2.67	2.92
6	0.20	0.37	2.23	2.41
8	0.15	0.34	2.24	2.41
10	−0.11	0.11	2.44	2.66
12	−0.38	−0.11	2.65	2.92
14	−0.46	−0.19	2.72	3.00
16	−0.17	0.06	2.47	2.70
18	−0.47	0.44	1.97	2.64