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  • Wiley  (2)
  • Pritchard, Nicola  (2)
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  • Wiley  (2)
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  • 1
    Online Resource
    Online Resource
    Wiley ; 2016
    In:  Ophthalmic and Physiological Optics Vol. 36, No. 2 ( 2016-03), p. 158-166
    In: Ophthalmic and Physiological Optics, Wiley, Vol. 36, No. 2 ( 2016-03), p. 158-166
    Abstract: To examine the retinal thickness profiles of individuals with and without diabetic retinopathy ( DR ). Methods Full retinal thickness in the central zone, overall and hemisphere thicknesses of the parafovea and perifovea, ganglion cell complex ( GCC ) thickness and retinal nerve fibre layer ( RNFL ) thickness were assessed in 185 individuals using spectral domain optical coherence tomography (88 individuals with diabetes but no DR , 55 with DR , and 42 non‐diabetic controls). The DR group comprised of 60% of participants with very mild non‐proliferative diabetic retinopathy ( NPDR ) (representing microaneurysms only) and 40% with mild NPDR (hard exudates, cotton‐wool spots, and/or mild retinal haemorrhages). Regression analysis was performed to determine the factors associated with retinal tissue thickness, taking into account, age, sex, presence of DR , duration of diabetes, HbA 1c levels and type of diabetes. Results The mean (S.D.) of the overall parafoveal thickness was 306 (16) in the DR group and 314 (14) in the control group ( p  = 0.02). The mean (S.D.) of the superior hemisphere parafoveal thickness was 309 (16) in the DR group and 318 (14) in the control group ( p  = 0.02). The mean (S.D.) of the inferior hemisphere parafoveal thickness was 303 (17) in the DR group and 311 (15) in the control group ( p  = 0.02). There were no significant differences in retinal thickness between groups in the central zone ( p  = 0.27) or perifovea ( p   〉  0.41). Neither the overall nor the hemisphere RNFL ( p   〉  0.75) and GCC thickness ( p   〉  0.37) were significantly different between the groups. Regression analysis revealed that parafoveal thickness in diabetic individuals was reduced in association with presence of DR ( B  = −5.9 μm, p  = 0.02) and with advancing age ( B  = −4.5 μm, p  = 0.004, for every 10 year increase in age) when adjusted for sex, duration of diabetes, HbA 1c levels and type of diabetes. Conclusion The inner macula is thinner in the presence of clinical signs of diabetic retinopathy and is compounded by advancing age. The influence of any macular oedema or that by cotton‐wool spots could not be ruled out and may still confound these results.
    Type of Medium: Online Resource
    ISSN: 0275-5408 , 1475-1313
    URL: Issue
    Language: English
    Publisher: Wiley
    Publication Date: 2016
    detail.hit.zdb_id: 2008422-5
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  • 2
    Online Resource
    Online Resource
    Wiley ; 2017
    In:  Ophthalmic and Physiological Optics Vol. 37, No. 4 ( 2017-07), p. 451-459
    In: Ophthalmic and Physiological Optics, Wiley, Vol. 37, No. 4 ( 2017-07), p. 451-459
    Abstract: To examine the capability of optical coherence tomography‐derived retinal thickness measures in detecting 4‐year incident diabetic peripheral neuropathy ( DPN ). Methods 145 eyes of 145 participants with diabetes but no DPN at baseline were examined for incident DPN . HbA 1c levels, nephropathy, neuropathy ( DPN ), cardiovascular measures, and various retinal thickness measures were examined at baseline and after 4 years. Incidence of DPN was defined as newly developed DPN at follow‐up. Baseline factors were assessed by univariate and a step‐wise multiple logistic regression, and the predictors were examined for diagnostic capabilities. Results Of the 145 participants without DPN at baseline, 51 had developed DPN when examined after 4 years (35% incidence). Of the ophthalmic variables, the mean (S.D.) of the overall thickness in the parafovea at baseline was 315 (18) μm in the no DPN group and 306 (18) μm in the ‘incidence’ group, and the differences were significant, p  = 0.005. The superior hemisphere parafovea (mean (S.D.): 318 (17) μm vs 310 (20) μm, p  = 0.02) and inferior hemisphere parafovea (313 (19) μm vs 302 (18) μm, p  = 0.002) were different in the incident DPN group compared with the no DPN group. When adjusted for age, retinal thickness in the parafovea ( AUC  = 0.65, p  = 0.003, 86% sensitivity and 44% specificity at 321 μm criterion), and body mass index or BMI (AUC = 0.65, p  = 0.003, 49% sensitivity and 83% specificity at 29.3 kg m −2 criterion) at baseline were significant predictors for 4‐year incident DPN . Conclusions A lower retinal thickness at the parafovea and a higher BMI can predict 4‐year incident neuropathy in patients with diabetes, with acceptable diagnostic accuracies. This OCT ‐derived measure may serve as a potential ophthalmic marker in the screening of patients at risk of developing DPN .
    Type of Medium: Online Resource
    ISSN: 0275-5408 , 1475-1313
    URL: Issue
    Language: English
    Publisher: Wiley
    Publication Date: 2017
    detail.hit.zdb_id: 2008422-5
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
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