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Table 1 Reference intervals (central 95%) of ADA2 activity and protein concentration in healthy children and adolescents

From: Adenosine deaminase 2 activity negatively correlates with age during childhood

Age Range (yrs)

Lower Limit

(2.5 percentile)

Upper Limit

(97.5 percentile)

ADA2 enzyme activity (U/L)

0–5

4.7

14.7

6–11

4.3

11.4

12–18

3.6

10.6

> 18

4.3

6.2

ADA2 protein concentration (μg/mL)

0–5

23.8

203.1

6–11

40.5

194.9

12–18

42.6

170.5

> 18

37.9

117.3

Normalized ADA2 enzyme activity (mU/mg)

0–5

35.0

232.5

6–11

41.6

135.2

12–18

35.1

107.4

> 18

45.0

158.4