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Table 1 Study cohort characteristics obtained through review of medical records and parent survey responses

From: Impact of pediatric hypophosphatasia on behavioral health and quality of life

Age (Years)

Sex

ALPL variant confirmed by molecular testing

Low alkaline phosphatase

Elevated vitamin B6

Clinical findings of HPP**

Asfotase alfa therapy

Duration of asfotase alfa therapy prior to enrollment

Mental health diagnoses***

3

F

c.1250A>G

X

 

PTL, SS

   

3.5

M

Not tested

X

X

PTL, SS

X

2 years

 

4

M

Not tested

X

X

PTL, C, MW, AG

X

2 years

OCD, sensory processing disorder

4.4

F

c.1259G>C

X

X

PTL

   

4.6

M

c.892G>A

 

X

    

4.9

F

c.1133A>T

X

X

PTL

   

5.3

M

c.407G>A; c.984_986delCTT; *c.818C>T

X

 

PTL, SS

X

1 year

 

5.5

F

Not available

X

 

PTL, C, MW

X

2 years (tapered off)

 

5.6

F

c.1133A>T

X

 

PTL, LBMD, SS

  

Anxiety

5.6

F

c.1171delC; c.406C>T

  

PTL, SS, BLB, R, MW, AG

X

5.5 years

 

5.8

F

c.1133A>T

X

X

PTL, BLB

   

5.9

F

c.407G>A; *c.1213>C

X

X

PTL, SS, BLB, R, MW, AG

X

2 years

 

5.9

M

c.1133A>T

X

X

PTL, LBMD

  

Anxiety

6

F

c.1471G>A; *c.1327G>T

 

X

PTL, C, CD, BLB

X

4 years

 

6.2

M

c.1133A>T

X

X

PTL

   

6.6

M

c.881A>C

X

 

SS, CD, MW

  

Autism spectrum disorder

7.7

M

c.1142A>G

X

 

PTL

  

Depression, disruptive behavior

7.7

M

c.976G>C

X

 

SS

  

Dyslexia

7.9

F

c.571G>A

  

PTL

   

8

F

Not available

X

 

PTL, CD, BLB, MW, AG

X

2.6 years

 

8.8

F

c.920C>T; c.1171C>T

  

PTL, LBMD, SS, CD, BLB, F, R, C, MW, AG

X

8.5 years

 

9.5

M

c.346G>A; c.571G>A

  

PTL, LBMD, CD, R, MW, AG

X

2.6 years

 

10.4

M

c.1250A>G

X

X

PTL, MW

   

10.5

M

*c.1157G>A

X

 

F, MW, AG

  

ADHD, disruptive behavior

13.2

M

Not available

X

 

PTL, SS, CD, BLB, R, C, MW, AG

X

8 years

 

13.3

M

c.340G>A

X

 

PTL, F, AG

X

Not available

ADHD, OCD, anxiety

13.6

M

Not available

X

 

PTL, BLB, F, R, MW, AG

X

0.8 year

 

13.6

F

Not available

X

X

PTL, SS, CD, BLB, R, MW, AG

X

6 years

 

15.4

M

Not tested

X

X

PTL, LBMD, R, MW, AG

X

1.6 years

Depression, dyslexia

16.6

F

c.526G>A; *c.371A>G

X

X

PTL, MW, AG

   
  1. *Variant of uncertain significance
  2. **Clinical findings of HPP. PTL premature tooth loss, LBMD low bone mineral density/osteopenia, SS short stature, CD chest deformity, BLB bowing of the long bones, R ricket-like bone findings on x-ray, F recurrent or poorly healing fractures, C craniosynostosis, MW muscle weakness, AG abnormal gait
  3. ***Mental health diagnosis confirmed by medical documentation. ADHD attention deficit hyperactivity disorder, OCD obsessive–compulsive disorder