Table 1.

Characteristics of the cohort of patients with hereditary hypophosphatemia^a.

	All patients (n=28)	XLHR (n=21)
Time of diagnosis
Sex (male/female) (n/n)	10/18	5/16
Family history of HH (n/N)	22/28	18/21
Age at diagnosis (years)	2.1 (0.1 to 15.5)	0.9 (0.1 to 15.5)
Height (z-score)	−0.9 (−6.5 to 1.0)	−1.2 (−6.5 to 1.0)
Skeletal diseaseb (n/N)	17/28	13/21
Treatment
Age at treatment start (years)	2.1 (0.2 to 15.6)	1 (0.2 to 6.7)
Elemental phosphorus (mg/kg per day)	39 (28 to 61)	39 (0 to 74)
Alfacalcidol (ng/kg per day)	33 (21 to 42)	34 (0 to 54)
Last registered consultation
Age (years)	12.1 (1.3 to 18.3)	10.8 (1.3 to 18.0)
Height (z-score)	−1.4 (−6.31 to 0.8)	−1.4 (−6.3 to 0.8)
Delta z-score height (z-score)	−0.1 (−3.1 to 2.0)	−0.1 (−3.1 to 2.0)
Dental involvement (n/N)	13/28	9/21
Nephrocalcinosis (n/N)	11/28	9/20c
Persistent bowing (n/N)	16/28	13/21

n/N, number of patients with this characteristic/total number of patients.

^aContinual variables are given as median (range).

^bSkeletal disease: clinical or radiological signs of rickets, or skeletal axis deviation.

^cInformation missing for one patient.