Table 2:
Interobserver variability of manual SAH volume measurement and comparison of the manual and automatic methods
| ICC Volumea (95% CI) | Bland-Altman Volume Limits of Agreement (mL) | ICC Densitya (95% CI) | Bland-Altman Density Limits of Agreement (HU) | Dice Coefficient (Mean and Range) | No.b | |
|---|---|---|---|---|---|---|
| Automatic interobserver | 0.98 (0.96–0.99) | −12.90–12.13 | 0.80 (0.62–0.90) | −7.58–9.18 | 0.55 (0.00–0.83) | 30 |
| Manual interobserver | 0.97 (0.77–0.99) | −18.68–6.24 | 0.98 (0.89–0.99)c | −1.52–3.44c | 0.64 (0.00–0.86) | 30 |
a
Case 3 intraclass correlation coefficients using an absolute agreement definition.
b
Number of NCCT scans included in the calculation.
c
Number of NCCT scans included for calculation = 29.