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. Author manuscript; available in PMC: 2015 Aug 1.
Published in final edited form as: Neurol Clin. 2014 Aug;32(3):569–vii. doi: 10.1016/j.ncl.2014.04.008

BOX 24. EFFECT OF RACE AND GENDER ON CK MEASUREMENTS.

Group Constituents ULN
High Black males 1,201 IU/L
Intermediate Nonblack males 504 IU/L
Black females 621 IU/L
Low Nonblack females 325 IU/L

Adapted from Silvestri NJ, Wolfe GI. Asymptomatic/pauci-symptomatic creatine kinase elevations (hyperckemia). Muscle Nerve. 2013 Jun;47(6):805-15.