Izračunajte procenat slobodnog PSA u odnosu na ukupni PSA. Ključni alat za procenu rizika od raka prostate i praćenje zdravlja prostate.
The PSA Percentage Calculator helps determine your free PSA percentage by calculating the ratio of free PSA to total PSA in blood samples. This essential prostate health tool provides accurate risk assessment for prostate cancer, especially when PSA levels fall within the diagnostic gray zone of 4-10 ng/mL. By calculating your free PSA percentage, healthcare providers can better distinguish between benign prostate conditions and potential malignancies.
Important Note: Free PSA value must not exceed total PSA value for accurate calculation.
Our PSA percentage calculator validates all inputs to ensure accurate results:
The PSA percentage calculation uses this precise formula:
Where:
The PSA percentage calculator follows these calculation steps:
All calculations use double-precision floating-point arithmetic for maximum accuracy.
Prostate Cancer Screening: Distinguishes benign conditions from potential cancer when total PSA ranges 4-10 ng/mL
Biopsy Decision Support: Higher free PSA percentage indicates lower cancer risk, potentially avoiding unnecessary biopsies
Prostate Health Monitoring: Tracks PSA level changes over time for diagnosed and undiagnosed conditions
Post-Treatment Surveillance: Monitors PSA after prostate cancer treatment to detect recurrence
Clinical Research: Supports trials and studies on prostate cancer detection strategies
While PSA percentage testing is widely used, consider these complementary screening options:
1970s: PSA first identified and purified by researchers
1980s: PSA blood test developed for prostate cancer detection
1990s: Free PSA concept introduced, improving testing specificity
2000s: Age-specific PSA ranges and PSA velocity refinements developed
2010s: New biomarkers and imaging complement PSA testing
Today: PSA percentage remains fundamental in prostate screening, often combined with other diagnostic methods for comprehensive risk assessment.
1' Excel Formula for Free PSA Percentage
2=IF(A1>0, IF(B1<=A1, B1/A1*100, "Error: Free PSA > Total PSA"), "Error: Total PSA must be > 0")
3
4' Where A1 is Total PSA and B1 is Free PSA
51def calculate_free_psa_percentage(total_psa, free_psa):
2 if total_psa <= 0:
3 raise ValueError("Total PSA must be greater than zero")
4 if free_psa > total_psa:
5 raise ValueError("Free PSA cannot be greater than Total PSA")
6 return (free_psa / total_psa) * 100
7
8# Example usage:
9total_psa = 10.0 # ng/mL
10free_psa = 2.0 # ng/mL
11try:
12 percentage = calculate_free_psa_percentage(total_psa, free_psa)
13 print(f"Free PSA Percentage: {percentage:.2f}%")
14except ValueError as e:
15 print(f"Error: {e}")
161function calculateFreePSAPercentage(totalPSA, freePSA) {
2 if (totalPSA <= 0) {
3 throw new Error("Total PSA must be greater than zero");
4 }
5 if (freePSA > totalPSA) {
6 throw new Error("Free PSA cannot be greater than Total PSA");
7 }
8 return (freePSA / totalPSA) * 100;
9}
10
11// Example usage:
12const totalPSA = 10.0; // ng/mL
13const freePSA = 2.0; // ng/mL
14try {
15 const percentage = calculateFreePSAPercentage(totalPSA, freePSA);
16 console.log(`Free PSA Percentage: ${percentage.toFixed(2)}%`);
17} catch (error) {
18 console.error(`Error: ${error.message}`);
19}
201public class PSACalculator {
2 public static double calculateFreePSAPercentage(double totalPSA, double freePSA) {
3 if (totalPSA <= 0) {
4 throw new IllegalArgumentException("Total PSA must be greater than zero");
5 }
6 if (freePSA > totalPSA) {
7 throw new IllegalArgumentException("Free PSA cannot be greater than Total PSA");
8 }
9 return (freePSA / totalPSA) * 100;
10 }
11
12 public static void main(String[] args) {
13 double totalPSA = 10.0; // ng/mL
14 double freePSA = 2.0; // ng/mL
15 try {
16 double percentage = calculateFreePSAPercentage(totalPSA, freePSA);
17 System.out.printf("Free PSA Percentage: %.2f%%%n", percentage);
18 } catch (IllegalArgumentException e) {
19 System.err.println("Error: " + e.getMessage());
20 }
21 }
22}
23Normal PSA Levels (Low Risk):
Borderline PSA Levels (Moderate Risk):
Elevated PSA Levels (Higher Risk):
Very Low Free PSA (Highest Risk):
PSA percentage interpretation varies by individual factors, but general guidelines include:
Always consult healthcare providers for personalized PSA test interpretation.
A free PSA percentage above 25% generally indicates lower prostate cancer risk. However, interpretation depends on total PSA levels, age, and other clinical factors.
Our PSA percentage calculator provides highly accurate results using double-precision arithmetic. Accuracy depends on the precision of your input PSA values from laboratory tests.
While PSA percentage helps assess cancer risk, it cannot definitively replace biopsy. It guides clinical decision-making about whether biopsy is necessary.
Several factors influence PSA levels including age, prostate size, inflammation, recent ejaculation, and certain medications. Discuss these with your healthcare provider.
PSA testing frequency depends on age, risk factors, and previous results. Men over 50 typically test annually, while high-risk individuals may test more frequently.
No, free PSA is an absolute value (ng/mL), while PSA percentage is the ratio of free to total PSA expressed as a percentage.
A low PSA percentage (especially <10%) suggests higher cancer risk but doesn't confirm cancer. Additional testing like biopsy may be recommended.
PSA percentage testing improves early detection accuracy, especially when total PSA is 4-10 ng/mL, helping identify cancers that might otherwise be missed.
Use our PSA Percentage Calculator to assess your prostate health risk quickly and accurately. Enter your PSA values now for instant results that can guide important health decisions with your healthcare provider.
Meta Title: PSA Percentage Calculator - Free PSA Ratio Tool Meta Description: Calculate your free PSA percentage instantly. Accurate PSA ratio calculator for prostate cancer risk assessment. Enter total and free PSA values for results.
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