Creatine Kinase (CK)
Females, Non-Hispanic Black
The median creatine kinase (CK) for Non-Hispanic Black females aged 20 and older in the US is 125 U/L, with 90% of the population falling between 56.8 U/L and 368 U/L.
NHANES 2017-March 2020 Pre-Pandemic 2017-2020 · Sample size: 1,059 participants · Unit: U/L
Percentile Distribution
| Percentile | P5 | P25 | P50 | P75 | P95 |
|---|---|---|---|---|---|
| Value (U/L) | 56.8 | 91 | 125 | 183 | 368 |
56.8 91 125 183 368
P5 P25 P50 P75 P95
Data and Methodology
- Dataset
- NHANES 2017-March 2020 Pre-Pandemic ( NHANES 2017-2020 2020 , Survey-weighted percentiles from the full MEC sample)
- Survey years
- 2017-2020
- Sample size
- 1,059 participants
- Reference population
- US civilian non-institutionalized Non-Hispanic Black females aged 20 and older from NHANES 2017-March 2020. Race and Hispanic origin is the NHANES RIDRETH3 recode of self-reported race and Hispanic origin. Includes the full population (not restricted to healthy individuals) to reflect the population distribution.
- Exclusion criteria
-
- Missing creatine kinase value (LBXSCK)
- Missing or zero combined pre-pandemic MEC sample weight (WTMECPRP)
- Age under 20
- Race/Hispanic origin other than Non-Hispanic Black (RIDRETH3 = 4)
- Participants coded RIDRETH3 = 7 (Other Race, including multiracial) are not published as a race/ethnicity slice; they remain in the age slices
- Notes
- Percentiles computed using the combined pre-pandemic MEC weight (WTMECPRP). Creatine kinase measured as LBXSCK; the NHANES codebook labels the unit IU/L, which is the same unit as U/L. Pooled across all adults aged 20 and older and not age-standardized, so differences between race/ethnicity slices partly reflect differences in age composition.
Other Demographic Groups
By age
By race and ethnicity
female