Creatinine: Young Adults vs Older Adults
Compare health metrics between young adults and older adults.
- Group A has no percentile data
- Group B has no percentile data
💡 Key Insight
There is a notable difference in creatinine: Older Adults (60-69) have 10% higher values compared to Young Adults (18-29).
Percentile Comparison
| Percentile | Young Adults (18-29) | Older Adults (60-69) | Difference |
|---|---|---|---|
| 5th | 0.7 mg/dL | 0.8 mg/dL | +14.3% |
| 25th | 0.9 mg/dL | 1 mg/dL | +11.1% |
| 50th | 1 mg/dL | 1.1 mg/dL | +10.0% |
| 75th | 1.1 mg/dL | 1.2 mg/dL | +9.1% |
| 95th | 1.3 mg/dL | 1.4 mg/dL | +7.7% |
| Mean | 1 mg/dL | 1.1 mg/dL | +10.0% |
Visual Comparison
🔬 Creatinine & Kidney Function
Creatinine is a waste product from muscle metabolism, filtered by the kidneys. It's used to estimate glomerular filtration rate (eGFR), the primary measure of kidney function. Because creatinine production depends on muscle mass, sex-specific equations are essential for accurate eGFR calculation.
Key Research Findings
- eGFR below 60 mL/min/1.73m² for 3+ months defines chronic kidney disease
- Cystatin C is an alternative marker less affected by muscle mass
- Acute kidney injury shows rapid creatinine rises over hours to days
- Certain medications and creatine supplements can affect levels
❓ Frequently Asked Questions
Why is creatinine similar between Young Adults (18-29) and Older Adults (60-69)?
Creatinine levels reflect muscle mass and kidney function. Higher values in men are due to greater muscle mass, which is why sex-specific reference ranges are used.
Source: NKFHow should I interpret my creatinine compared to these benchmarks?
Find your appropriate demographic group and percentile range. Being in the 25th-75th percentile (middle 50%) is typical. Percentiles below 5th or above 95th may warrant discussion with a healthcare provider, though clinical context is essential—a single measurement rarely tells the whole story.
Source: Clinical GuidelinesHow reliable is this comparison data?
This data comes from the CDC's National Health and Nutrition Examination Survey (NHANES), a continuously conducted survey that uses rigorous sampling methodology to represent the U.S. civilian non-institutionalized population. Sample sizes typically exceed 5,000 per demographic group, with weighted analysis accounting for the complex survey design.
Source: CDC NHANESWhat This Comparison Means
Understanding differences in creatinine between young adults (18-29) and older adults (60-69) is important for:
- Accurate benchmarking – Compare yourself to the appropriate reference population
- Clinical interpretation – Healthcare providers use demographic-specific ranges
- Research understanding – Biological and lifestyle factors influence these differences
- Personalized health goals – Set realistic targets based on your demographic
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