Table 3.

Discordance across the applied classification systems in a five-category interpretation.

		Three Continent AMD Consortium Severity Scale					Total, n
		No AMD, n	Mild early AMD, n	Moderate early AMD, n	Severe early AMD, n	Late AMD, n
Clinical Classification	No AMD, no apparent aging changes, n	286	0	0	0	0	286
	No AMD, normal aging changes, n	239	0	0	0	0	239
	Early AMD, n	275	0	0	0	0	275
	Intermediate AMD, n	2	93	44	38	0	177
	Late AMD, n	0	0	0	0	63	63
Total, n		802	93	44	38	63	1040

Shown are cross-tabulated number of participants by AMD status for the Clinical Classification⁹ and the Three Continent AMD Consortium Severity Scale¹⁰ using the five-category scale.

Abbreviations: AMD = age-related macular degeneration.