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Test ID: S_FX
Protein S Activity, Plasma

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Secondary ID A test code used for billing and in test definitions created prior to November 2011

80775

Reference Values Describes reference intervals and additional information for interpretation of test results. May include intervals based on age and sex when appropriate. Intervals are Mayo-derived, unless otherwise designated. If an interpretive report is provided, the reference value field will state this.

Males: 65-160%

Females

<50 years: 50-160%

> or =50 years: 65-160%

Newborn infants have normal or near-normal free protein S antigen (> or =50%), although total protein S antigen is usually below the adult reference range. There are insufficient data concerning protein S activity in normal neonates, infants, and children; but normal or near-normal activity (> or =50%) probably is present by age 3 to 6 months.



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