Mail in colon test accuracy
The accuracy of mail-in colon cancer screening tests, also known as fecal occult blood tests (FOBTs), can vary depending on several factors. Here are some general accuracy statistics:
- Sensitivity: The ability of the test to detect cancer when it is present. Studies have shown that the sensitivity of FOBTs for detecting colon cancer is around 70-80%.
- Specificity: The ability of the test to rule out cancer when it is not present. The specificity of FOBTs is generally high, ranging from 90-95%.
- False positives: The percentage of tests that are positive for cancer when the patient does not actually have cancer. The false positive rate for FOBTs is relatively low, around 1-2%.
- False negatives: The percentage of tests that are negative for cancer when the patient actually has cancer. The false negative rate for FOBTs is higher, around 10-20%.
A 2019 study published in the journal Gastroenterology found that the sensitivity of FOBTs for detecting colon cancer was 74.1%, while the specificity was 93.5%. Another study published in the journal Cancer Epidemiology, Biomarkers & Prevention in 2018 found that the sensitivity of FOBTs was 71.4%, while the specificity was 94.1%.
It's important to note that the accuracy of FOBTs can be affected by several factors, including:
- The type of test used: There are several types of FOBTs available, including guaiac-based tests and immunochemical tests. Immunochemical tests may be more accurate than guaiac-based tests.
- The quality of the test kit: The accuracy of the test kit can vary depending on the manufacturer and the quality of the kit.
- The patient's diet: A diet high in fiber and certain foods can interfere with the accuracy of FOBTs.
- The patient's age and health status: FOBTs may be less accurate in older adults and individuals with certain health conditions.
Overall, while FOBTs are not perfect, they can be a useful tool for detecting colon cancer and can help reduce the risk of death from this disease.