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Table 4: Likelihood ratios of detecting nerve root avulsions using different imaging predictors
Predictors of Nerve Root Avulsion Findings on Imaging Likelihood Ratio
CT MRI CT and MRI
Pseudomeningoceles with absent rootlets A 17 22.7 22.7
Any pseudomeningocele A and B 18 22.7 22.7
Any pseudomeningocele or any absent rootlets A, B, and C 18 13.6 13.6
Any pseudomeningocele or any rootlet abnormality A, B, C, D, and E 3.7 5.4 5.4

Predictors of Nerve Root Avulsion	Findings on Imaging	Likelihood Ratio
Predictors of Nerve Root Avulsion	Findings on Imaging	CT	MRI	CT and MRI
Pseudomeningoceles with absent rootlets	A	17	22.7	22.7
Any pseudomeningocele	A and B	18	22.7	22.7
Any pseudomeningocele or any absent rootlets	A, B, and C	18	13.6	13.6
Any pseudomeningocele or any rootlet abnormality	A, B, C, D, and E	3.7	5.4	5.4