Abstract
Purpose :
Humphrey Standard Automated Perimetry (SAP) is an exam of difficult comprehension and execution by patients. In clinical practice the prevalence of non-reliable tests is high, especially for elderly patients with glaucoma. This study tested the hypothesis that patients with low cognitive performance measured by the Mini-Mental Estate Examination (MMEE) have more difficulty to perform Humphrey Standard Automated Perimetry
Methods :
Thirty patients over 65 years old from the Department of Ophthalmology of Santa Casa de São Paulo Hospital underwent the MMEE right after doing the Humphrey Standard Automated Perimetry, 24-2 SITA standard strategy. Only eyes with at least Visual Acuity (VA) of 20/200 were included. Patients were divided into two 2 groups: Non-reliable SAP tests (fixation loss [FL] > 20% or false positive [FP] responses > 15% or false negative [FN] responses > 15%) and reliable SAP tests (FL ≤ 20% or FP ≤ 15% or FN ≤ 15%). The student's t test (demographic data) and Mann-Whitney U test (MMEE score) were used for statistical comparisons.
Results :
The non-reliable tests included 22 patients and the reliable tests comprised 28 subjects. There was no statistical difference between the groups when comparing age (non-reliable: 74.2 + 3.2, reliable: 71.9 + 5.7, P = 0.08), Mean Deviation (MD) (non-reliable: -8.9 + 7.2, reliable: -9.8 + 7.3, P = 0.669) and VA (non-reliable: 0.60 + 0.46, reliable: 0.55 + 0.22, P = 0.466). When MMEE score was compared between groups, the non-reliable group had lower mini-mental score as compared to the reliable group. The difference, however, failed to reach statistical significance (non-reliable: 22.6 + 4.3, reliable: 24.7 + 4.1 with P = 0.06)
Conclusions :
Patients with lower cognitive performance shows a tendency of performing worse SAP tests when compared to those with better MMEE scores
This is an abstract that was submitted for the 2017 ARVO Annual Meeting, held in Baltimore, MD, May 7-11, 2017.