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Interrater reliability of electrodiagnosis in neonatal brachial plexopathy.
Muscle & Nerve 2017 January
INTRODUCTION: We investigated interrater reliability of overall assessment of nerve root lesions by electrodiagnostic testing (EDX) in neonatal brachial plexus palsy (NBPP).
METHODS: Two blinded, board-certified reviewers retrospectively reviewed de-identified EDX data from 37 infants with NBPP for 2005-2012. Only nerve conduction and electromyography needle data were included. The examiners independently assigned 1 of 4 nerve root lesion categories: (1) pre-ganglionic lesion (avulsion), (2) post-ganglionic lesion (rupture), (3) normal, or (4) "unable to determine." Simple percentage agreement, the Cohen kappa statistic representing interrater reliability for each nerve root (C5-T1), and overall kappa between examiners were evaluated.
RESULTS: Interrater reliabilities were substantial to almost perfect for each nerve root except C5. Considering all nerve roots, overall interrater reliability was substantial (kappa = 0.62); simple percentage agreement was 75% (138/185).
CONCLUSIONS: Interrater reliability of nerve root assessment by EDX for infants with NBPP was high for C6-T1 root levels, but less reliable for C5 because of technical factors. Muscle Nerve 55: 69-73, 2017.
METHODS: Two blinded, board-certified reviewers retrospectively reviewed de-identified EDX data from 37 infants with NBPP for 2005-2012. Only nerve conduction and electromyography needle data were included. The examiners independently assigned 1 of 4 nerve root lesion categories: (1) pre-ganglionic lesion (avulsion), (2) post-ganglionic lesion (rupture), (3) normal, or (4) "unable to determine." Simple percentage agreement, the Cohen kappa statistic representing interrater reliability for each nerve root (C5-T1), and overall kappa between examiners were evaluated.
RESULTS: Interrater reliabilities were substantial to almost perfect for each nerve root except C5. Considering all nerve roots, overall interrater reliability was substantial (kappa = 0.62); simple percentage agreement was 75% (138/185).
CONCLUSIONS: Interrater reliability of nerve root assessment by EDX for infants with NBPP was high for C6-T1 root levels, but less reliable for C5 because of technical factors. Muscle Nerve 55: 69-73, 2017.
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