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Table 3 Comparison of methods versus PIB-PET results

From: Predicting amyloid status in corticobasal syndrome using modified clinical criteria, magnetic resonance imaging and fluorodeoxyglucose positron emission tomography

  Criteria FDG-Qual FDG-Quant MRI
Number 25 23 22 24
True negative 10 6 7 6
True positive 9 10 9 8
False negative 2 1 1 3
False positive 4 6 5 7
Accuracy 0.76 0.70 0.73 0.58
Rater confidence rating 44% 74% N/A 54%
  1. Criteria = modified clinical criteria; True Negative = number of patients categorized as fvCBS who were PIB negative; True Positive = number of patients categorized as tpvCBS who were PIB positive; False Negative = number of patients categorized as fvCBS who were PIB positive; False Positive = number of patients categorized as tpvCBS who were PIB negative; Accuracy = True Negative + True Positive/total Number; Confidence Rating = number of highly confident/total number of patients; FDG-Qual, fluorodeoxyglucose PET qualitative (visual assessment); FDG-Quant, fluorodeoxyglucose PET quantitative (computed using ROI); MRI, magnetic resonance imaging; N/A, not applicable; PET, positron emission tomography; ROI, region of interest.