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. Author manuscript; available in PMC: 2015 Aug 1.
Published in final edited form as: Ophthalmology. 2014 Apr 4;121(8):1539–1546. doi: 10.1016/j.ophtha.2014.02.021

Table 3.

95% Confidence Intervals for Kalman Filter Error

95% Confidence Interval
Variable 6 Months 2 Years 5 Years
Present MD (−0.1493, 0.0329) (−0.1294, 0.1361) (−0.2979, 0.3882)
MD Velocity (−0.0163, −0.0003) (−0.0175, 0.0024) (−0.0361, 0.0000)
Present PSD (0.0163, 0.1227) (0.1308, 0.2880) (0.4675, 0.8394)
PSD Velocity (0.0065, 0.0168) (0.0039, 0.0166) (−0.0028, 0.0195)
Present IOP (−0.2487, 0.0121) (−0.2751, 0.0792) (−0.6454, 0.0519)
IOP Velocity (−0.0033, 0.0194) (−0.0117, 0.0185) (−0.0365, 0.0175)

The 95% confidence intervals of the Kalman filter error for each of the variables contain 0 or are close to containing 0 when the Kalman filter is used to predict 6 months, 2 years, and 5 years into the future. This means the values predicted by the Kalman filter are not significantly different from the values observed (alpha=0.05).

MD = mean deviation; PSD = pattern standard deviation; IOP = intraocular pressure