Table 1.

 Cases and controls by age and sex

Age group	Controls			Cases
	Male	Female	Total	Male	Female	Total
75–79	1344	1504	2848	26	48	74
80–84	511	633	1144	47	112	159
85–89	123	187	310	45	131	176
90+	21	41	62	20	87	107
Total	1999	2365	4364	138	378	516

“Cases” are people with AMD causing visual impairment. “Controls” are people with 6/6 vision or better (binocular acuity). Data from the 49 practices taking part in vision add-on study to the MRC Trial of the Assessment and Management of Older People in the Community.