function calculateGFR() {
var cr = parseFloat(document.getElementById('creatinine').value);
var age = parseFloat(document.getElementById('age').value);
var gender = document.getElementById('gender').value;
var race = document.getElementById('race').value;
var resultDiv = document.getElementById('gfr-result-box');
var gfrValue = document.getElementById('gfr-value');
var gfrStage = document.getElementById('gfr-stage');
var gfrDesc = document.getElementById('gfr-description');
if (isNaN(cr) || isNaN(age) || cr <= 0 || age = 90) {
stage = "Stage 1 (Normal)";
desc = "A GFR above 90 with a creatinine of " + cr + " mg/dL typically indicates normal kidney function, provided there are no other signs of kidney damage.";
color = "#28a745";
bgColor = "#e8f5e9";
} else if (finalGFR >= 60) {
stage = "Stage 2 (Mildly Decreased)";
desc = "This indicates a mild reduction in kidney function. For many, a creatinine of " + cr + " is stable, but regular monitoring is advised.";
color = "#8bc34a";
bgColor = "#f1f8e9";
} else if (finalGFR >= 45) {
stage = "Stage 3a (Mild to Moderate)";
desc = "Your GFR suggests a moderate decrease in kidney function. Consult with a healthcare professional to review diet and lifestyle.";
color = "#ffc107";
bgColor = "#fffde7";
} else if (finalGFR >= 30) {
stage = "Stage 3b (Moderate to Severe)";
desc = "A significant reduction in kidney function is indicated. Professional medical evaluation is necessary to manage potential complications.";
color = "#fd7e14";
bgColor = "#fff3e0";
} else if (finalGFR >= 15) {
stage = "Stage 4 (Severely Decreased)";
desc = "Severe kidney damage is present. Close coordination with a nephrologist is typically required.";
color = "#dc3545";
bgColor = "#ffebee";
} else {
stage = "Stage 5 (Kidney Failure)";
desc = "This indicates established kidney failure. Immediate medical intervention and planning for dialysis or transplant are standard.";
color = "#c82333";
bgColor = "#f8d7da";
}
gfrStage.innerText = stage;
gfrStage.style.color = color;
gfrStage.style.backgroundColor = bgColor;
gfrDesc.innerText = desc;
}
Understanding 1.01 mg/dL Creatinine and GFR
A serum creatinine level of 1.01 mg/dL is generally considered within the "normal" range for many healthy adults. However, the creatinine number alone doesn't tell the full story of your kidney health. To get a precise picture, doctors look at the Glomerular Filtration Rate (GFR).
Why 1.01 mg/dL Creatinine Matters
Creatinine is a waste product produced by your muscles during normal daily activity. Your kidneys are responsible for filtering this waste out of your blood and into your urine. When your kidneys are functioning optimally, creatinine levels remain stable. A level of 1.01 mg/dL suggests that your kidneys are actively clearing waste, but the effectiveness of that clearance depends on your age, body size, and gender.
How GFR is Calculated
The GFR is an estimate of how many milliliters of blood your kidneys filter every minute. We use the CKD-EPI equation, which is currently the clinical standard. The formula takes your 1.01 mg/dL creatinine reading and adjusts it based on:
- Age: Kidney function naturally declines slightly as we age.
- Sex: Men generally have more muscle mass than women, leading to higher baseline creatinine.
- Body Surface Area: Standardized to 1.73m² for comparison across different populations.
Example Scenarios for 1.01 mg/dL Creatinine
To illustrate how GFR varies even when creatinine stays at 1.01 mg/dL:
| Profile |
Creatinine |
Estimated GFR |
Interpretation |
| 30-year-old Male |
1.01 mg/dL |
104 |
Excellent/Normal |
| 75-year-old Female |
1.01 mg/dL |
58 |
Mildly to Moderately Decreased |
What Your Results Mean
A GFR over 90 is typically considered normal. If your result is between 60 and 89, it may be normal for your age or could indicate early-stage kidney disease if other markers (like protein in the urine) are present. If the result is consistently below 60, it usually indicates Chronic Kidney Disease (CKD).
Medical Disclaimer: This calculator is for educational purposes only. Always consult with a qualified healthcare provider or nephrologist to interpret your lab results and medical history.