Observer Scores of Preference in Paired Scans with Statistical Significance
Patient no. | 2D 2 min vs. 2D 4 min | 2D 2 min vs. 2D 3 min | 2D 3 min vs. 2D 4 min | 3D 2 min vs. 3D 4 min | 3D 2 min vs. 3D 3 min | 3D 3 min vs. 3D 4 min | 2D 2 min vs. 3D 2 min | 2D 3 min vs. 3D 3 min | 2D 4 min vs. 3D 4 min |
---|---|---|---|---|---|---|---|---|---|
1 | −1 | 0 | −1 | +2 | +1 | +1 | 0 | +1 | +2 |
2 | −1 | 0 | +1 | −1 | 0 | −1 | −1 | +2 | −1 |
3 | 0 | 0 | 0 | −1 | 0 | +1 | 0 | +2 | +1 |
4 | +1 | +1 | −1 | +1 | +1 | 0 | +2 | +2 | +1 |
5 | −1 | 0 | 0 | +2 | −1 | 0 | +1 | +2 | +2 |
6 | −1 | −1 | 0 | +1 | −1 | −1 | +1 | +1 | +1 |
7 | +2 | +1 | 0 | −2 | +1 | −1 | −1 | +2 | +1 |
8 | +1 | −1 | −1 | −1 | −1 | +1 | +1 | +1 | +1 |
9 | −2 | −1 | 0 | 0 | 0 | 0 | 0 | +2 | +2 |
10 | +2 | +2 | +1 | +2 | +1 | +1 | −2 | +1 | +2 |
11 | 0 | +1 | −1 | −1 | 0 | 0 | +1 | +1 | +2 |
12 | 0 | −2 | +1 | 0 | 0 | +1 | −1 | +1 | +1 |
13 | +2 | +1 | +2 | +1 | +1 | +1 | 0 | +1 | +1 |
14 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
Mean | 0.14 | 0.07 | 0.07 | 0.21 | 0.14 | 0.21 | 0.07 | 1.36 | 1.14 |
SE | 0.35 | 0.29 | 0.25 | 0.35 | 0.21 | 0.21 | 0.29 | 0.17 | 0.23 |
95% CI | −0.60 to −0.89 | −0.55 to −0.69 | −0.46 to −0.60 | −0.54 to −0.97 | −0.30 to −0.59 | −0.25 to −0.68 | −0.55 to −0.69 | 0.99 to −1.72 | 0.64 to −1.64 |
P | 0.34 | 0.4 | 0.39 | 0.28 | 0.25 | 0.17 | 0.4 | 0.0001 | 0.0001 |
Scan choice | Non | Non | Non | Non | Non | Non | Non | 3D | 3D |
Non = No significant preference between scans was observed.
Score of 0 suggested no preference; score of +1 implied second scan was superior, whereas −1 signified that first scan was superior. Similarly, score of ±2 indicated one scan, compared with other, was far superior.