Number and percentage of AVMs detected on ASL and conventional MR imaging, with κ coefficient for interreader reliability
| Sequence | Total Number of AVMs Detected | % of AVMs Detected (n = 57) | Interreader Agreement (Cohen κ Coefficient)a |
|---|---|---|---|
| MR imaging with ASL | 51 | 89.5% | 0.801 |
| Conventional MR imaging without ASL | 43 | 75.4% | 0.704 |
| P value .046 |
↵a Strength of agreement based on Cohen κ coefficient score: none to slight κ < 0.20, fair κ = 0.21–0.40, moderate κ = 0.41–0.60, substantial κ = 0.61–0.80, near perfect κ = 0.81–0.99. P-value derived from McNemar's test.