Creatine Kinase (CK)
Females, Age 40-49
The median creatine kinase (CK) for US females aged 40-49 is 82 U/L, with 90% of the population falling between 38 U/L and 225.7 U/L.
NHANES 2017-March 2020 Pre-Pandemic 2017-2020 · Sample size: 649 participants · Unit: U/L
Percentile Distribution
| Percentile | P5 | P10 | P25 | P50 | P75 | P90 | P95 |
|---|---|---|---|---|---|---|---|
| Value (U/L) | 38 | 50 | 60 | 82 | 119.3 | 177 | 225.7 |
| Percentile | Value (U/L) |
|---|---|
| P5 | 38 |
| P10 | 50 |
| P25 | 60 |
| P50 | 82 |
| P75 | 119.3 |
| P90 | 177 |
| P95 | 225.7 |
38 60 82 119.3 225.7
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
- 649 participants
- Reference population
- US civilian non-institutionalized females aged 40-49 from NHANES 2017-March 2020. 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 outside 40-49 range
- 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.