Table 4 Inter rater and intra rater intraclass correlation of raw volumes (ml) and percentage difference (%) using ellipsoid approximation with lower and upper limits of agreement (LOA) for primaries and largest suspect LN
From: Approximation of head and neck cancer volumes in contrast enhanced CT
Volume | Intraclass correlation | Bias | Std. deviation | Lower LOA | Upper LOA | |
|---|---|---|---|---|---|---|
Inter rater correlation | Primary (ml) | 0.95 | −1.6 | 6.4 | −14.1 | +10.9 |
Primary (%) | - | −13.8 | 37.9 | −88.1 | +60.5 | |
Largest LN (ml) | 0.99 | −0.3 | 3.1 | −5.7 | +6.4 | |
Largest LN (%) | - | −0.8 | 35.6 | −70.6 | +69.0 | |
Intra rater correlation | Primary (ml) | 0.99 | +0.7 | 3.2 | −5.6 | +6.9 |
Primary (%) | - | +4.6 | 14.9 | −24.6 | +33.8 | |
Largest LN (ml) | 0.99 | +0.5 | 1.4 | −2.3 | +3.2 | |
Largest LN (%) | - | +6.3 | 16.3 | −25.6 | +38.2 |