Practical recommendations for measuring rates of visual field change in glaucoma

被引:382
作者
Chauhan, B. C. [1 ]
Garway-Heath, D. F. [2 ,3 ,4 ]
Goni, F. J. [5 ]
Rossetti, L. [6 ]
Bengtsson, B. [7 ]
Viswanathan, A. C. [2 ,3 ,4 ]
Heijl, A. [7 ]
机构
[1] Dalhousie Univ, Dept Ophthalmol & Visual Sci, Queen Elizabeth II Hlth Sci Ctr, Halifax, NS B3H 2Y9, Canada
[2] Moorfields Eye Hosp, London, England
[3] UCL, London, England
[4] NIHR Biomed Res Ctr, Inst Ophthalmol, London, England
[5] USP, Barcelona Glaucoma Ctr, Inst Oftalmol Barcelona, Barcelona, Spain
[6] Univ Milan, Dept Ophthalmol, Eye Clin, San Paolo Hosp, Milan, Italy
[7] Lund Univ, Dept Ophthalmol, Malmo Univ Hosp, Lund, Sweden
关键词
D O I
10.1136/bjo.2007.135012
中图分类号
R77 [眼科学];
学科分类号
100212 ;
摘要
To date, there has been a lack of evidence-based guidance on the frequency of visual field examinations required to identify clinically meaningful rates of change in glaucoma. The objective of this perspective is to provide practical recommendations for this purpose. The primary emphasis is on the period of time and number of examinations required to measure various rates of change in mean deviation ( MD) with adequate statistical power. Empirical data were used to obtain variability estimates of MD while statistical modelling techniques derived the required time periods to detect change with various degrees of visual field variability. We provide the frequency of examinations per year required to detect different amounts of change in 2, 3 and 5 years. For instance, three examinations per year are required to identify an overall change in MD of 4 dB over 2 years in a patient with average visual field variability. Recommendations on other issues such as examination type, strategy and quality are also made.
引用
收藏
页码:569 / 573
页数:5
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