Table 4.

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

		Three Continent AMD Consortium Severity Scale
		No AMD, n	“Any early” AMDb, n	Late AMD, n	Total, n
Clinical Classification	No AMD, n	525	0	0	525
	“Any early or intermediate” AMDa, n	277	175	0	452
	Late AMD, n	0	0	63	63
Total, n		802	175	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 three categories “no AMD”, “any early or intermediate AMD”, and “late AMD”.

Abbreviations: AMD = age-related macular degeneration;

^aFor the Clinical Classification collapsing early AMD and intermediate AMD.

^bFor the Three Continent AMD Consortium Severity Scale, collapsing mild early AMD, moderate early AMD, and severe early AMD to “any early” AMD.