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Table 2 Demographic/clinical characteristics and duration of follow-up of patients with ≥1 year of follow-up

From: Frequency and age at occurrence of clinical manifestations of disease in patients with hypophosphatasia: a systematic literature review

Characteristic

Value

Total cases, n (%)

265 (100.0)

Male, n (%)

118 (44.5)

Median (IQR) age at anchor visit, yearsa

4.0 (0.4–34.0)

Reported family history of HPP, n (%)

74 (27.9)

Age at first reported occurrence of HPP manifestations, n (%)

In utero

30 (11.5)

Infancy/early childhood (<  2 years)

101 (38.7)

Childhood (2 to < 10 years)

78 (29.9)

Adolescence (10 to < 18 years)

9 (3.4)

Adulthood (≥ 18 years)

43 (16.5)

Median (IQR) duration of follow-up by age at first reported occurrence of HPP manifestations, years

Overall

7.0 (3.0–18.0)

In utero

4.0 (2.1–10.3)

Infancy/early childhood (<  2 years)

5.4 (2.4–14.8)

Childhood (2 to < 10 years)

7.7 (3.6–28.5)

Adolescence (10 to < 18 years)

6.0 (4.3–27.0)

Adulthood (≥ 18 years)

15.0 (6.3–27.0)

  1. All patients who had been followed longitudinally for at least 1 year were included in this analysis
  2. aAnchor visit: first presentation to author of the case report
  3. HPP hypophosphatasia, IQR interquartile range