Statistical measure of agreement or reliability between observers or repeated measurements
Expansion
Intraclass Correlation Coefficient
Purpose
Quantifies inter-rater and intra-rater reliability in imaging studies
Clinical Context
Intraclass correlation coefficient: 0.0 to 0.2 poor, 0.21 to 0.40 fair, 0.41 to 0.60 moderate, 0.61 to 0.80 good, 0.81 to 1.0 excellent. Two-way mixed intraclass correlation coefficient most common.
Related Terms
- Kappa
- Correlation
Key Points
- Intraclass correlation coefficient greater than 0.9 excellent agreement, 0.75 to 0.9 good, less than 0.75 fair or poor. Reports intraclass correlation coefficient with 95 percent confidence interval