Classification Tables for the Multivariate Binary Logistic Regression Models and Corresponding Diagnostic Performance Indicators.
DSA=0 | DSA =0 | DSA=1 | DSA =1 | Sensitivity | Specificity | PPV | NPV | |
---|---|---|---|---|---|---|---|---|
Assessment of presence of DAVF | Predicted = 0 (TN) † | Predicted = 1 (FP) † | Predicted = 0 (FN) † | Predicted = 1 (TP) † | [95% C.I. in %]‡ | [95% C.I. in %]‡ | [95% C.I. in %]‡ | [95% C.I. in %]‡ |
Structural MRI Alone | 227 | 7 | 51 | 25 | 32.89% [22.33 – 43.46] | 97.01% [94.83 – 99.19] | 78.13% [63.80 – 92.45] | 81.65% [77.10 – 86.20] |
Structural MRI plus TOF MRA | 219 | 3 | 17 | 53 | 75.71% [65.67 – 85.76] | 98.65% [97.13 – 100.17] | 94.64% [88.75 – 100.54] | 92.80% [89.50 – 96.10] |
Structural MRI plus TOF MRA plus ASL | 214 | 8 | 8 | 62 | 88.57% [81.12 – 96.02] | 96.40% [93.94 – 98.85] | 88.57% [81.12 – 96.02] | 96.40% [93.94 – 98.85] |
Classification table was generated for a probability value of p=0.5 for each of the three multivariate models.
There is a 95% chance that the point estimate (z) of the sensitivity, specificity, PPV or NPV lies within this interval and a 5% that the true value is either below or above this interval. The 95% C.I. were computed based on z ± 1.96 × Standard Error.