Utility of assessing nerve morphology in central cornea versus whorl area for diagnosing diabetic peripheral neuropathy

Pritchard, Nicola, Dehghani, Cirous, Edwards, Katie, Burgin, Edward, Cheang, Nick, Kim, Hannah, Mikhaiel, Merna, Stanton, Gemma, Russell, Anthony W., Malik, Rayaz A., & Efron, Nathan (2015) Utility of assessing nerve morphology in central cornea versus whorl area for diagnosing diabetic peripheral neuropathy. Cornea, 34(7), pp. 756-761.

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Abstract

Purpose

To compare small nerve fiber damage in the central cornea and whorl area in participants with diabetic peripheral neuropathy (DPN) and to examine the accuracy of evaluating these 2 anatomical sites for the diagnosis of DPN.

Methods

A cohort of 187 participants (107 with type 1 diabetes and 80 controls) was enrolled. The neuropathy disability score (NDS) was used for the identification of DPN. The corneal nerve fiber length at the central cornea (CNFLcenter) and whorl (CNFLwhorl) was quantified using corneal confocal microscopy and a fully automated morphometric technique and compared according to the DPN status. Receiver operating characteristic analyses were used to compare the accuracy of the 2 corneal locations for the diagnosis of DPN.

Results

CNFLcenter and CNFLwhorl were able to differentiate all 3 groups (diabetic participants with and without DPN and controls) (P < 0.001). There was a weak but significant linear relationship for CNFLcenter and CNFLwhorl versus NDS (P < 0.001); however, the corneal location x NDS interaction was not statistically significant (P = 0.17). The area under the receiver operating characteristic curve was similar for CNFLcenter and CNFLwhorl (0.76 and 0.77, respectively, P = 0.98). The sensitivity and specificity of the cutoff points were 0.9 and 0.5 for CNFLcenter and 0.8 and 0.6 for CNFLwhorl.

Conclusions

Small nerve fiber pathology is comparable at the central and whorl anatomical sites of the cornea. Quantification of CNFL from the corneal center is as accurate as CNFL quantification of the whorl area for the diagnosis of DPN.

Impact and interest:

5 citations in Scopus
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5 citations in Web of Science®

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ID Code: 84299
Item Type: Journal Article
Refereed: Yes
Keywords: Corneal confocal microscopy, ,corneal subbasal nerve plexus, diabetic peripheral neuropathy
DOI: 10.1097/ICO.0000000000000447
ISSN: 0277-3740
Divisions: Current > QUT Faculties and Divisions > Faculty of Health
Current > Institutes > Institute of Health and Biomedical Innovation
Current > Schools > School of Optometry & Vision Science
Funding:
Copyright Owner: Copyright 2015 Wolters Kluwer Health, Inc
Deposited On: 19 May 2015 22:55
Last Modified: 24 Jan 2017 22:17

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