|
Characteristic
|
Patients (n = 59)
|
|---|
|
Sex, n (%)
|
|
Male
|
30 (50.8)
|
|
Female
|
29 (49.2)
|
|
Mean height, cm (SD)
|
|
Male (n = 26)
|
106.5 (29.4)
|
|
Female (n = 27)
|
105.7 (35.1)
|
|
Mean height Z-score, (SD)a
|
|
Male (n = 30)
|
−3.0 (3.5)
|
|
Female (n = 29)
|
−3.2 (2.3)
|
|
Age at survey, years
|
|
Mean (SD)
|
7.6 (5.1)
|
|
Range
|
0–17
|
|
Age at HPP symptom onset, years
|
|
Mean (SD)
|
0.8 (0.9)
|
|
Range
|
0–4
|
|
Duration of symptomatic disease, years
|
|
Mean (SD)
|
7.0 (5.0)
|
|
Range
|
0–16
|
- a Mean height Z-scores were calculated using the Centers for Disease Control and Prevention method; because the date of birth or exact age in months for each patient was unknown, reported ages in whole numbers were rounded to 0.5 years (e.g. ages of 2 to < 3 years were rounded to 2.5 years)
- HPP hypophosphatasia, SD standard deviation
