FIT Test False Positive Rate Calculator

Calculate FIT (fecal immunochemical test) false positive rate and positive predictive value based on population CRC prevalence and cutoff threshold. Standard cutoff 20 μg Hb/g feces: PPV 3–5% in average risk.

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Clinical Guidance

BMI is a screening measure of body size, not a direct measure of body fat. The standard WHO categories are underweight (<18.5), normal (18.5–24.9), overweight (25–29.9), and obese (≥30).

BMI can overestimate body fat in athletes with high muscle mass and underestimate it in older adults with low muscle mass. Interpret it alongside waist circumference and clinical context rather than as a standalone diagnosis.

⚕ Clinical Disclaimer: These calculators are for educational and reference purposes only. Always verify results with qualified clinical judgment and current clinical guidelines. Do not use as a sole basis for medical decisions.
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How It Works

Calculate FIT (fecal immunochemical test) false positive rate and positive predictive value based on population CRC prevalence and cutoff threshold. Standard cutoff 20 μg Hb/g feces: PPV 3–5% in average risk

Each component has a specific meaning:

  • Population CRC prevalence — The population crc prevalence recorded for the scenario being assessed.
  • Cutoff threshold — The cutoff threshold recorded for the scenario being assessed.

Note: Interpret the fit false positive rate result against the thresholds and context described above.

How to Use

Enter the population CRC prevalence, cutoff threshold for the scenario you are assessing. Calculate FIT (fecal immunochemical test) false positive rate and positive predictive value based on population CRC prevalence and cutoff threshold. Standard cutoff 20 μg Hb/g feces: PPV 3–5% in average risk. Use the fit false positive rate result to inform your calculation.

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Frequently Asked Questions