Table 2. Mean range levels for... | American Society of Hematology

Table 2.

Mean range levels for antithrombin, protein C, and protein S deficiencies in the study population

Deficiency	No. of subjects	Antigen, mean ± SD, %	Activity, mean ± SD, %	Average age (range), y
Antithrombin	22	48.8 ± 12.3	45.6 ± 10.2	12 (3-17)
Protein C	29	46.8 ± 12.2	43.6 ± 5.8	13 (1-17)
Protein S	19	48.5 ± 16.4,* 46.9 ± 5.8^†	40.1 ± 12.8	12 (6-17)

Deficiency	No. of subjects	Antigen, mean ± SD, %	Activity, mean ± SD, %	Average age (range), y
Antithrombin	22	48.8 ± 12.3	45.6 ± 10.2	12 (3-17)
Protein C	29	46.8 ± 12.2	43.6 ± 5.8	13 (1-17)
Protein S	19	48.5 ± 16.4,* 46.9 ± 5.8^†	40.1 ± 12.8	12 (6-17)

Protein S total antigen.

Protein S free antigen.