Comparison of the new perimetric GATE strategy with conventional full-threshold and SITA standard strategies

Ulrich Schiefer, John P. Pascual, Lorna (Beth) Edmunds, Elisabeth Feudner, Esther M. Hoffmann, Chris A. Johnson, Wolf A. Lagrèze, Norbert Pfeiffer, Pamela A. Sample, Flemming Staubach, Richard Weleber, Reinhard Vonthein, Elke Krapp, Jens Paetzold

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Abstract

PURPOSE. A new, fast-threshold strategy, German Adaptive Thresholding Estimation (GATE/GATE-i), is compared to the full-threshold (FT) staircase and the Swedish Interactive Thresholding Algorithm (SITA) Standard strategies. GATE-i is performed in the initial examination and GATE refers to the results in subsequent examinations. METHODS. Sixty subjects were recruited for participation in the study: 40 with manifest glaucoma, 10 with suspected glaucoma, and 10 with ocular hypertension. The subjects were evaluated by each threshold strategy on two separate sessions within 14 days in a randomized block design. RESULTS. SITA standard, GATE-i, and GATE thresholds were 1.2, 0.6, and 0.0 dB higher than FT. The SITA standard tended to have lower thresholds than those of FT, GATE-i, and GATE for the more positive thresholds, and also in the five seed locations. For FT, GATE-i, GATE, and SITA Standard, the standard deviations of thresholds between sessions were, respectively, 3.9, 4.5, 4.2, and 3.1 dB, test-retest reliabilities (Spearman's rank correlations) were 0.84, 0.76, 0.79, and 0.71, test-retest agreements as measured by the 95% reference interval of differences were -7.69 to 7.69, -8.76 to 9.00, -8.40 to 8.56, and -7.01 to 7.44 dB, and examination durations were 9.0, 5.7, 4.7, and 5.6 minutes. The test duration for SITA Standard increased with increasing glaucomatous loss. CONCLUSIONS. The GATE algorithm achieves thresholds that are similar to those of FT and SITA Standard, with comparable accuracy, test-retest reliability, but with a shorter test duration than FT.

Original languageEnglish (US)
Pages (from-to)488-494
Number of pages7
JournalInvestigative Ophthalmology and Visual Science
Volume50
Issue number1
DOIs
StatePublished - Jan 2009

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Reproducibility of Results
Glaucoma
Ocular Hypertension
Seeds

ASJC Scopus subject areas

  • Ophthalmology
  • Sensory Systems
  • Cellular and Molecular Neuroscience
  • Medicine(all)

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Comparison of the new perimetric GATE strategy with conventional full-threshold and SITA standard strategies. / Schiefer, Ulrich; Pascual, John P.; Edmunds, Lorna (Beth); Feudner, Elisabeth; Hoffmann, Esther M.; Johnson, Chris A.; Lagrèze, Wolf A.; Pfeiffer, Norbert; Sample, Pamela A.; Staubach, Flemming; Weleber, Richard; Vonthein, Reinhard; Krapp, Elke; Paetzold, Jens.

In: Investigative Ophthalmology and Visual Science, Vol. 50, No. 1, 01.2009, p. 488-494.

Research output: Contribution to journalArticle

Schiefer, U, Pascual, JP, Edmunds, LB, Feudner, E, Hoffmann, EM, Johnson, CA, Lagrèze, WA, Pfeiffer, N, Sample, PA, Staubach, F, Weleber, R, Vonthein, R, Krapp, E & Paetzold, J 2009, 'Comparison of the new perimetric GATE strategy with conventional full-threshold and SITA standard strategies', Investigative Ophthalmology and Visual Science, vol. 50, no. 1, pp. 488-494. https://doi.org/10.1167/iovs.08-2229
Schiefer, Ulrich ; Pascual, John P. ; Edmunds, Lorna (Beth) ; Feudner, Elisabeth ; Hoffmann, Esther M. ; Johnson, Chris A. ; Lagrèze, Wolf A. ; Pfeiffer, Norbert ; Sample, Pamela A. ; Staubach, Flemming ; Weleber, Richard ; Vonthein, Reinhard ; Krapp, Elke ; Paetzold, Jens. / Comparison of the new perimetric GATE strategy with conventional full-threshold and SITA standard strategies. In: Investigative Ophthalmology and Visual Science. 2009 ; Vol. 50, No. 1. pp. 488-494.
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T1 - Comparison of the new perimetric GATE strategy with conventional full-threshold and SITA standard strategies

AU - Schiefer, Ulrich

AU - Pascual, John P.

AU - Edmunds, Lorna (Beth)

AU - Feudner, Elisabeth

AU - Hoffmann, Esther M.

AU - Johnson, Chris A.

AU - Lagrèze, Wolf A.

AU - Pfeiffer, Norbert

AU - Sample, Pamela A.

AU - Staubach, Flemming

AU - Weleber, Richard

AU - Vonthein, Reinhard

AU - Krapp, Elke

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N2 - PURPOSE. A new, fast-threshold strategy, German Adaptive Thresholding Estimation (GATE/GATE-i), is compared to the full-threshold (FT) staircase and the Swedish Interactive Thresholding Algorithm (SITA) Standard strategies. GATE-i is performed in the initial examination and GATE refers to the results in subsequent examinations. METHODS. Sixty subjects were recruited for participation in the study: 40 with manifest glaucoma, 10 with suspected glaucoma, and 10 with ocular hypertension. The subjects were evaluated by each threshold strategy on two separate sessions within 14 days in a randomized block design. RESULTS. SITA standard, GATE-i, and GATE thresholds were 1.2, 0.6, and 0.0 dB higher than FT. The SITA standard tended to have lower thresholds than those of FT, GATE-i, and GATE for the more positive thresholds, and also in the five seed locations. For FT, GATE-i, GATE, and SITA Standard, the standard deviations of thresholds between sessions were, respectively, 3.9, 4.5, 4.2, and 3.1 dB, test-retest reliabilities (Spearman's rank correlations) were 0.84, 0.76, 0.79, and 0.71, test-retest agreements as measured by the 95% reference interval of differences were -7.69 to 7.69, -8.76 to 9.00, -8.40 to 8.56, and -7.01 to 7.44 dB, and examination durations were 9.0, 5.7, 4.7, and 5.6 minutes. The test duration for SITA Standard increased with increasing glaucomatous loss. CONCLUSIONS. The GATE algorithm achieves thresholds that are similar to those of FT and SITA Standard, with comparable accuracy, test-retest reliability, but with a shorter test duration than FT.

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