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Abstract #24868 Published in IGR 11-4
Risk factors for normal-tension glaucoma among subgroups of patients
Park SC; Lee DH; Lee HJ; Kee CArchives of Ophthalmology 2009; 127: 1275-1283
OBJECTIVE: To identify risk factors for normal-tension glaucoma among subgroups of patients. METHODS: In 93 patients with unilateral normal-tension glaucoma, intereye comparison of baseline spherical equivalent, central corneal thickness, untreated intraocular pressure, disc area, and zone beta variables was performed among the following 4 subgroups classified according to age and visual field pattern standard deviation of the eye with glaucoma: subgroup 1 (age < or = 50 years and visual field pattern standard deviation < or = 8 dB), subgroup 2 (< or = 50 years and >8 dB), subgroup 3 (>50 years and < or = 8 dB), and subgroup 4 (>50 years and >8 dB). RESULTS: Fourteen, 27, 30, and 22 patients were included in subgroups 1, 2, 3, and 4, respectively. The untreated intraocular pressure in subgroup 1 (P = .005), the zone beta variables in subgroup 2 (P < .001), and both the untreated intraocular pressure (P = .010 and P = .034, respectively) and the zone beta variables (P < or = .008 and P < or = .006, respectively) in subgroups 3 and 4 were significantly greater in the eyes with glaucoma than in the normal contralateral eyes (by paired t test or Wilcoxon signed rank test). The other variables showed no significant difference between the eyes in any subgroup. CONCLUSION: The zone beta variables (and not the untreated intraocular pressure) may represent significant risk factors in young patients having normal-tension glaucoma with moderate to severe visual field loss.
Department of Ophthalmology, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea.
Classification:
9.2.4 Normal pressure glaucoma (Part of: 9 Clinical forms of glaucomas > 9.2 Primary open angle glaucomas)
9.2.2 Other risk factors for glaucoma (Part of: 9 Clinical forms of glaucomas > 9.2 Primary open angle glaucomas)
