Table 4.

Estimated Misclassification Probabilities (%, 95% Confidence Interval)

True State	Observed State
	Level 1	Level 2	Level 3	Level 4	Level 5
Level 1	99.31	0.23	0.39	0.03	0.04
	(97.74–99.79)	(0.01–0.61)	(0.01–1.69)	(0.00–0.15)	(0.00–0.06)
Level 2	16.22	62.37	20.87	0.47	0.06
	(2.32–29.78)	(47.66–84.57)	(5.49–27.38)	(0.01–1.55)	(0.02–0.15)
Level 3	6.47	2.29	61.98	28.35	0.90
	(0.06–17.70)	(0.03–30.20)	(37.10–90.97)	(1.97–41.10)	(0.05–1.57)
Level 4	0.07	1.75	10.79	64.16	23.24
	(0.03–3.51)	(0.04–11.03)	(0.06–52.74)	(43.36–94.10)	(0.23–39.85)
Level 5	0.03	0.03	3.31	1.82	94.81
	(0.01–0.06)	(0.01–0.06)	(0.02–8.73)	(0.10–17.95)	(79.11–99.71)

Level 1, no AMD; level 2, minimally severe early AMD; level 3, moderately severe early AMD; level 4, severe early AMD; level 5, late AMD.