Table 3. Summary data for all patients.
All patients (n = 30) | ||||
Lesion Count | ||||
Image type | Mean | Differences in means | (95% CI) | p-value |
FO | 7.8 | Baseline | - | - |
WO | 7.5 | -0.37 | -1.9 to 1.3 | 0.713 |
FOC | 7.5 | -0.37 | -1.9 to 1.3 | 0.713 |
WOC | 8.8 | 1.29 | -0.55 to 2.66 | 0.196 |
DWI | 11.7 | 4.83 | 2.34 to 5.55 | <0.001 |
Sensitivity | ||||
Image type | Mean | Differences in means | (95% CI) | p-value |
FO | 0.46 | Baseline | - | - |
WO | 0.47 | 0.11 | -0.09 to 0.102 | 0.909 |
FOC | 0.46 | 0.04 | -0.094 to 0.098 | 0.968 |
WOC | 0.61 | 2.96 | 0.049 to 0.242 | 0.003 |
DWI | 0.72 | 5.32 | 0.165 to 0.358 | <0.001 |
PPV | ||||
Image type | Mean | Differences in means | (95% CI) | p-value |
FO | 0.75 | Baseline | - | - |
WO | 0.83 | 1.68 | -0.011 to 0.138 | 0.094 |
FOC | 0.77 | 0.41 | -0.058 to 0.088 | 0.683 |
WOC | 0.94 | 4.55 | 0.095 to 0.24 | <0.001 |
DWI | 0.86 | 3.13 | 0.043 to 0.187 | 0.002 |
Confidence | ||||
Image type | Mean | Differences in means | (95% CI) | p-value |
FO | 2.9 | Baseline | - | - |
WO | 2.6 | -2.12 | -0.41 to -0.02 | 0.034 |
FOC | 2.7 | -1.23 | -0.32 to 0.07 | 0.22 |
WOC | 2.9 | 0.67 | -0.13 to 0.26 | 0.503 |
DWI | 3.2 | 3.57 | 0.16 to 0.55 | <0.001 |
True Positives | ||||
Image type | Mean | Differences in means | (95% CI) | p-value |
FO | 6.2 | Baseline | - | - |
WO | 7.0 | 1.02 | -0.697 to 2.208 | 0.308 |
FOC | 6.6 | 0.45 | -1.112 to 1.786 | 0.653 |
WOC | 8.4 | 2.98 | 0.759 to 3.663 | 0.003 |
DWI | 10.6 | 5.92 | 2.937 to 5.841 | <0.001 |
Lesion count, true positives, sensitivity, positive predictive value and confidence were compared between the five image types for all patients, using the fat only images as the baseline. Regression analyses used image types as the predictor variable, and lesion count/TP/sensitivity/confidence were used as the outcome variable. Mean values were calculated by the regression analysis and were equal to means calculated manually from all patients and all three radiologists.