Table 4.
Systematic error for interreader measurements by nodule margin
| Nodule margin | Systematic error (95%-LoA) | |||||
|---|---|---|---|---|---|---|
| Reader number | ||||||
| 1 | 2 | 3 | ||||
| Abs. (mm) | Rel. (%) | Abs. (mm) | Rel. (%) | Abs. (mm) | Rel. (%) | |
| Smooth | −0.3 (±1.5) | −5 (±27) | 0.1 (±1.4) | 1 (±22) | 0.2 (±1.3) | 3 (±26) |
| Lobulated | −0.1 (±1.3) | 0 (±19) | 0.2 (±1.0) | 2 (±17) | 0.6a (±1.9) | 8a (±29) |
| Spiculated | 0.5a (±1.9) | 7a (±27) | 1.1a (±3.0) | 14a (±36) | 0.2 (±1.9) | 2 (±26) |
| Irregular | 0.8a (±2.7) | 8a (±26) | 0.3 (±3.7) | 2 (±42) | 0.1 (±2.0) | 1 (±18) |
| Total | 0.2a (±2.1) | 2 (±27) | 0.4a (±2.6) | 5a (±32) | 0.3a (±1.8) | 4a (±25) |
95%-LoA, 95% limits of agreement; Abs, absolute systematic error; Rel (%), relative difference in percentage.
Number in brackets is 95%-LoA.
a
Significant difference p < 0.05 (Wilcoxon).