Assess the minimal percentage change for test result:
To assess if two results on a patient are significantly different from a biological variation, the two results being compared need to be present.
Minimal percentage change > 2.77 (CVA2 + CVI2)1/2 with 95% confidence
(adopted from Soletormos, et al. Clin Chem 1993; 10: 2077-83)
- Analytical Performance Database for Clinicians (Table 1)
- POCT Analytical Performance Database for Clinicians (Table 2)
Uncertainty of measurement is not applicable for qualitative tests such as faecal occult blood screening.