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Table 2 Characteristics (observer-induced errors, accuracy, sensitivity and specificity) of different popular indices

From: A review of the trunk surface metrics used as Scoliosis and other deformities evaluation indices

  Intra-observer error Inter-observer error Threshold for scoliosis cases Threshold for change (as suggested by Asher[58]) Sensitivity Specificity
Cobb   ± 5° High Low
POTSI 5.5 6.4 28.1 ± 8 Low High
SHS 1.2 1.9 9.0 ± 3.5   
DAPI      High Low
Moiré      High Low
Adam     High Low