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Evaluation of a new perimetric threshold strategy, SITA, in patients with manifest and suspect glaucoma

Bengtsson, B LU and Heijl, A LU (1998) In Acta Ophthalmologica Scandinavica1998-01-01+01:002008-01-01+01:00 76(3). p.72-268
Abstract

PURPOSE: To evaluate the performance of the new perimetric threshold strategy SITA relative to older methods.

METHOD: Thirty-two patients with either glaucoma or ocular hypertension performed two threshold visual field tests with each of three threshold strategies, SITA, Humphrey Full Threshold, and Fastpac. Testing was distributed over three visits, and testing order was balanced between strategies to control for order effects.

RESULTS: SITA tests consumed 54% of the time taken by Full Threshold tests on average, and 85% of Fastpac tests; SITA's test times were significantly shorter than those of Full Threshold (p<0.0001) and Fastpac (p=0.0008). Test-retest threshold variability did not differ significantly between... (More)

PURPOSE: To evaluate the performance of the new perimetric threshold strategy SITA relative to older methods.

METHOD: Thirty-two patients with either glaucoma or ocular hypertension performed two threshold visual field tests with each of three threshold strategies, SITA, Humphrey Full Threshold, and Fastpac. Testing was distributed over three visits, and testing order was balanced between strategies to control for order effects.

RESULTS: SITA tests consumed 54% of the time taken by Full Threshold tests on average, and 85% of Fastpac tests; SITA's test times were significantly shorter than those of Full Threshold (p<0.0001) and Fastpac (p=0.0008). Test-retest threshold variability did not differ significantly between strategies. Intertest variability of the pattern deviation analysis was lowest in SITA (p<0.01) relative to both Full Threshold and Fastpac. Both SITA and Fastpac showed higher than expected average sensitivities relative to Full Threshold. SITA and Fastpac showed approximately the same amount of visual field loss. There was a significant relationship between Mean Deviation and the SITA function used to shorten stimulus sequences at points where measurement errors are small (p<0.0001).

CONCLUSION: Our results suggest that SITA matches the precision of older thresholding methods, consuming considerably and significantly less test time. This indicates that SITA could replace Full Threshold as the standard clinical test used in glaucoma management, without decreasing the quality of test results.

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author
organization
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type
Contribution to journal
publication status
published
subject
keywords
Aged, Aged, 80 and over, Algorithms, Evaluation Studies as Topic, Glaucoma, Humans, Middle Aged, Ocular Hypertension, Reproducibility of Results, Sensitivity and Specificity, Sensory Thresholds, Vision Disorders, Visual Field Tests, Visual Fields
in
Acta Ophthalmologica Scandinavica1998-01-01+01:002008-01-01+01:00
volume
76
issue
3
pages
5 pages
publisher
Wiley-Blackwell
external identifiers
  • Scopus:0031867951
ISSN
1395-3907
language
English
LU publication?
yes
id
e47c83b3-027d-4281-8da8-5538f1d74315
date added to LUP
2016-08-30 16:56:54
date last changed
2016-11-28 14:27:18
@misc{e47c83b3-027d-4281-8da8-5538f1d74315,
  abstract     = {<p>PURPOSE: To evaluate the performance of the new perimetric threshold strategy SITA relative to older methods.</p><p>METHOD: Thirty-two patients with either glaucoma or ocular hypertension performed two threshold visual field tests with each of three threshold strategies, SITA, Humphrey Full Threshold, and Fastpac. Testing was distributed over three visits, and testing order was balanced between strategies to control for order effects.</p><p>RESULTS: SITA tests consumed 54% of the time taken by Full Threshold tests on average, and 85% of Fastpac tests; SITA's test times were significantly shorter than those of Full Threshold (p&lt;0.0001) and Fastpac (p=0.0008). Test-retest threshold variability did not differ significantly between strategies. Intertest variability of the pattern deviation analysis was lowest in SITA (p&lt;0.01) relative to both Full Threshold and Fastpac. Both SITA and Fastpac showed higher than expected average sensitivities relative to Full Threshold. SITA and Fastpac showed approximately the same amount of visual field loss. There was a significant relationship between Mean Deviation and the SITA function used to shorten stimulus sequences at points where measurement errors are small (p&lt;0.0001).</p><p>CONCLUSION: Our results suggest that SITA matches the precision of older thresholding methods, consuming considerably and significantly less test time. This indicates that SITA could replace Full Threshold as the standard clinical test used in glaucoma management, without decreasing the quality of test results.</p>},
  author       = {Bengtsson, B and Heijl, A},
  issn         = {1395-3907},
  keyword      = {Aged,Aged, 80 and over,Algorithms,Evaluation Studies as Topic,Glaucoma,Humans,Middle Aged,Ocular Hypertension,Reproducibility of Results,Sensitivity and Specificity,Sensory Thresholds,Vision Disorders,Visual Field Tests,Visual Fields},
  language     = {eng},
  number       = {3},
  pages        = {72--268},
  publisher    = {ARRAY(0xb1549f0)},
  series       = {Acta Ophthalmologica Scandinavica1998-01-01+01:002008-01-01+01:00},
  title        = {Evaluation of a new perimetric threshold strategy, SITA, in patients with manifest and suspect glaucoma},
  volume       = {76},
  year         = {1998},
}