Corneal Nerve Parameter Reference Values for Chinese Adults Assessed by Corneal Confocal Microscopy

Background. Confocal corneal microscopy is an excellent new noninvasive tool for assessing diabetic peripheral neuropathy. We aimed to investigate the clinical variables associated with corneal nerve parameters and establish reference values for clinical use in healthy Chinese adults. Methods. The s...

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Main Authors: Juan Cao, Jingru Qu, Bekzod Odilov, Bin Lu, Yuanpin Zhang, Lili Li, Yuan Zhang, Qian Xiong, Yu Hong, Jianqiao Li, Yunfeng Shen, Xinguo Hou
Format: Article
Language:English
Published: Wiley 2022-01-01
Series:Journal of Diabetes Research
Online Access:http://dx.doi.org/10.1155/2022/4913031
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author Juan Cao
Jingru Qu
Bekzod Odilov
Bin Lu
Yuanpin Zhang
Lili Li
Yuan Zhang
Qian Xiong
Yu Hong
Jianqiao Li
Yunfeng Shen
Xinguo Hou
author_facet Juan Cao
Jingru Qu
Bekzod Odilov
Bin Lu
Yuanpin Zhang
Lili Li
Yuan Zhang
Qian Xiong
Yu Hong
Jianqiao Li
Yunfeng Shen
Xinguo Hou
author_sort Juan Cao
collection DOAJ
description Background. Confocal corneal microscopy is an excellent new noninvasive tool for assessing diabetic peripheral neuropathy. We aimed to investigate the clinical variables associated with corneal nerve parameters and establish reference values for clinical use in healthy Chinese adults. Methods. The study enlisted 257 healthy volunteers (137 females and 120 males) from two clinical academic centers in China. Two experts captured and selected images of the central corneal subbasal nerve plexus at each center using the same corneal confocal microscopy instrument according to a commonly adopted protocol. Corneal nerve fiber density (CNFD), corneal nerve branch density (CNBD), and corneal nerve fiber length (CNFL) were measured using fully automated software (ACCMetrics). The correlation between clinical indicators and confocal corneal microscopy measures was determined using partial correlation. Quantile regression was used to calculate reference values and estimate the effects of clinical factors on the normative values of confocal corneal microscopy measures. Results. Females had significantly higher CNFD, CNBD, and CNFL than males. There was no correlation between age, glycated hemoglobin (HbA1c), height, weight, body mass index (BMI), and any corneal nerve fiber parameter in both sexes. In either sex, age, weight, height, BMI, and HbA1c did not affect the 0.05th quantile values of any corneal nerve parameter. Conclusions. This study establishes sex-adjusted reference values for corneal confocal microscopy measures in Chinese adults and provides a reference for clinical practice and research with this technique.
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spelling doaj-art-84b1ca3b22f043a39206de845dd1d4962025-02-03T06:06:49ZengWileyJournal of Diabetes Research2314-67532022-01-01202210.1155/2022/4913031Corneal Nerve Parameter Reference Values for Chinese Adults Assessed by Corneal Confocal MicroscopyJuan Cao0Jingru Qu1Bekzod Odilov2Bin Lu3Yuanpin Zhang4Lili Li5Yuan Zhang6Qian Xiong7Yu Hong8Jianqiao Li9Yunfeng Shen10Xinguo Hou11Department of EndocrinologyDepartment of EndocrinologyDepartment of EndocrinologyDepartment of Endocrinology and MetabolismDepartment of Endocrinology and MetabolismDepartment of EndocrinologyClinical Epidemiology UnitDepartment of Endocrinology and MetabolismDepartment of Endocrinology and MetabolismDepartment of OphthalmologyDepartment of Endocrinology and MetabolismDepartment of EndocrinologyBackground. Confocal corneal microscopy is an excellent new noninvasive tool for assessing diabetic peripheral neuropathy. We aimed to investigate the clinical variables associated with corneal nerve parameters and establish reference values for clinical use in healthy Chinese adults. Methods. The study enlisted 257 healthy volunteers (137 females and 120 males) from two clinical academic centers in China. Two experts captured and selected images of the central corneal subbasal nerve plexus at each center using the same corneal confocal microscopy instrument according to a commonly adopted protocol. Corneal nerve fiber density (CNFD), corneal nerve branch density (CNBD), and corneal nerve fiber length (CNFL) were measured using fully automated software (ACCMetrics). The correlation between clinical indicators and confocal corneal microscopy measures was determined using partial correlation. Quantile regression was used to calculate reference values and estimate the effects of clinical factors on the normative values of confocal corneal microscopy measures. Results. Females had significantly higher CNFD, CNBD, and CNFL than males. There was no correlation between age, glycated hemoglobin (HbA1c), height, weight, body mass index (BMI), and any corneal nerve fiber parameter in both sexes. In either sex, age, weight, height, BMI, and HbA1c did not affect the 0.05th quantile values of any corneal nerve parameter. Conclusions. This study establishes sex-adjusted reference values for corneal confocal microscopy measures in Chinese adults and provides a reference for clinical practice and research with this technique.http://dx.doi.org/10.1155/2022/4913031
spellingShingle Juan Cao
Jingru Qu
Bekzod Odilov
Bin Lu
Yuanpin Zhang
Lili Li
Yuan Zhang
Qian Xiong
Yu Hong
Jianqiao Li
Yunfeng Shen
Xinguo Hou
Corneal Nerve Parameter Reference Values for Chinese Adults Assessed by Corneal Confocal Microscopy
Journal of Diabetes Research
title Corneal Nerve Parameter Reference Values for Chinese Adults Assessed by Corneal Confocal Microscopy
title_full Corneal Nerve Parameter Reference Values for Chinese Adults Assessed by Corneal Confocal Microscopy
title_fullStr Corneal Nerve Parameter Reference Values for Chinese Adults Assessed by Corneal Confocal Microscopy
title_full_unstemmed Corneal Nerve Parameter Reference Values for Chinese Adults Assessed by Corneal Confocal Microscopy
title_short Corneal Nerve Parameter Reference Values for Chinese Adults Assessed by Corneal Confocal Microscopy
title_sort corneal nerve parameter reference values for chinese adults assessed by corneal confocal microscopy
url http://dx.doi.org/10.1155/2022/4913031
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