Abstract:
OBJECTIVE:To investigate the impact of age-related change of macular and circumpapillary retinal nerve fiber layer (RNFL) measurements on evaluation of glaucoma progression. DESIGN:Prospective, longitudinal study. PARTICIPANTS:A total of 150 eyes of 90 patients with glaucoma and 72 eyes of 40 normal individuals. METHODS:Both eyes were imaged by the Cirrus HD-OCT (Carl Zeiss Meditec, Dublin, CA; optic nerve head and macular scans were taken every 4 months for a mean of 45.8 months (range, 35.4-60.6 months). The mean age-related rates of change of macular (including the ganglion cell and inner plexiform layer [GCIPL], inner retina [IR], outer retina [OR], and total macular thicknesses) and circumpapillary RNFL measurements were estimated with linear mixed models in the normal group. Macular and RNFL progression were then evaluated in individual eyes in the glaucoma group, with trend analysis before and after accounting for age-related change using the lower 95% confidence intervals (CIs) of the mean age-related rates of change as cutoffs. The survival probability was evaluated with the Kaplan-Meier estimator, and the agreement of progression detection among the structural parameters was calculated with Kappa statistics. MAIN OUTCOME MEASURES:Detection of glaucoma progression and survival probability of macular and RNFL parameters. RESULTS:Before accounting for age-related change, 50.0% (75 eyes) showed progression by the GCIPL thickness, 50.0% (75 eyes) showed progression by the IR thickness, 30.0% (45 eyes) showed progression by the total macular thickness, 27.3% (41 eyes) showed progression by the circumpapillary RNFL thickness, and 10.0% (15 eyes) showed progression by the OR thickness. The survival probability of GCIPL and IR thicknesses were significantly worse compared with circumpapillary RNFL thickness (P ≤ 0.001). After accounting for age-related change, the proportions decreased to 14.7%, 20.0%, 16.0%, 26.7%, and 1.3%, respectively, with the circumpapillary RNFL thickness demonstrating the worst survival probability. The agreement of progression detection between RNFL and macular measurements was poor with (kappa range, -0.055 to 0.185) or without (kappa range, -0.046 to 0.173) taking age-related change into consideration. CONCLUSIONS:Age-related change of macular and circumpapillary RNFL measurements can be detected in normal eyes and can affect the analysis of glaucoma progression. The impact is more substantial in analyzing macular progression than circumpapillary RNFL progression.
journal_name
Ophthalmologyjournal_title
Ophthalmologyauthors
Leung CKS,Ye C,Weinreb RN,Yu M,Lai G,Lam DSdoi
10.1016/j.ophtha.2013.07.021subject
Has Abstractpub_date
2013-12-01 00:00:00pages
2485-2492issue
12eissn
0161-6420issn
1549-4713pii
S0161-6420(13)00621-0journal_volume
120pub_type
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