screening interval
Recommended time period between successive cancer screening tests for asymptomatic individuals.
Full Definition
Screening interval refers to the evidence-based time frame between repeated cancer screening tests in asymptomatic individuals at average risk for a particular cancer. These intervals are determined by balancing the benefits of early cancer detection against the risks and costs of screening, including false positives, overdiagnosis, and patient anxiety. Different cancers have different optimal screening intervals based on factors such as cancer growth rates, test sensitivity and specificity, and population risk factors. For example, mammography is typically recommended every 1-2 years, while colonoscopy intervals are usually 10 years due to the slower development of colorectal cancer.
Usage
Usage note: Distinguish from surveillance intervals (for patients with known disease) and follow-up intervals (after abnormal results).
In Context
- "The screening interval for cervical cancer was extended to five years with negative HPV co-testing." — Clinical guideline update
- "Patients with family history may require shorter screening intervals than the general population." — Risk stratification protocol