Bicarbonate
Females, Age 70+
The median serum bicarbonate for US females aged 70+ in the US population is 26.0 mmol/L, with 90% of the population falling between 22.0 and 30.0 mmol/L.
NHANES 2017-March 2020 Pre-Pandemic 2017-2020 · Sample size: 1,106 participants · Unit: mmol/L
Percentile Distribution
| Percentile | P5 | P25 | P50 | P75 | P95 |
|---|---|---|---|---|---|
| Value (mmol/L) | 22 | 24 | 26 | 28 | 30 |
22 24 26 28 30
P5 P25 P50 P75 P95
Data and Methodology
- Dataset
- NHANES 2017-March 2020 Pre-Pandemic ( NHANES 2017–2020 2020 , Survey-weighted percentiles from full MEC sample)
- Survey years
- 2017-2020
- Sample size
- 1,106 participants
- Reference population
- US civilian non-institutionalized females aged 70+ from NHANES 2017-March 2020. Includes the full population (not restricted to healthy individuals) to reflect the population distribution.
- Exclusion criteria
-
- Missing bicarbonate measurement (LBXSC3SI)
- Missing or zero MEC sample weight (WTMEC)
- Age outside 70+ range
- Notes
- Percentiles computed using survey-weighted analysis (WTMEC weight, divided by 2 to pool two cycles). Serum bicarbonate (total CO2) measured as LBXSC3SI in mmol/L.