What does the intercept mean in this context? What is the estimated % decline in visual field
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Ophthalmology
Retinitis pigmentosa (RP) is a hereditary ocular disease in which patches of pigment appear on the retina, potentially resulting in substantial vision loss and in some cases complete blindness. An important issue is how fast the subjects decline. Visual field is an important measure of area of vision, which is measured in degree2. A visual field area for a normal person is around 11,000 degree2. The longitudinal data in Table 11.29 were provided by an individual patient.
Table 11.29: Longitudinal visual field data for one RP patient
Suppose the rate of change of ln (visual field) is a linear function of follow-up time.
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The intercept of 7743 means that we estimate the patients lnvisual area at baseline ...View the full answer
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