CK reference range for females?

CK reference range for females?

• A. CK 55-170
• B. CK 10-100
• C. CK 60-180
• D. CK 30-135

Answer: (D)

Creatine kinase is an enzyme released from muscle tissue, and normal levels depend on several factors, including sex. In healthy adult females, the typical reference range is about 30 to 135 U/L. This range accounts for the normal amount of CK present in muscle and the natural variability between individuals and labs. Values within this interval are considered normal for females, while higher values can point to muscle injury or stress, and very low values are not expected in adults. Ranges like 55-170 or 60-180 reflect ranges more commonly seen in males due to greater average muscle mass. A range such as 10-100 is too low on the upper end for many healthy females and would miss normal variation. So the 30-135 U/L range best matches adult female reference standards.

Creatine kinase is an enzyme released from muscle tissue, and normal levels depend on several factors, including sex. In healthy adult females, the typical reference range is about 30 to 135 U/L. This range accounts for the normal amount of CK present in muscle and the natural variability between individuals and labs. Values within this interval are considered normal for females, while higher values can point to muscle injury or stress, and very low values are not expected in adults.

Ranges like 55-170 or 60-180 reflect ranges more commonly seen in males due to greater average muscle mass. A range such as 10-100 is too low on the upper end for many healthy females and would miss normal variation. So the 30-135 U/L range best matches adult female reference standards.