Table 1.

Participant demographics and characteristics of geographic atrophy at first appearance.

Participants	850
Mean age (years), mean (SD)	74.9 (6.8)
Female	490 (57.6%)
Education level
High school or less	305 (35.9%)
At least some college	391 (46.0%)
Postgraduate	154 (18.1%)
Smoking status
Never	346 (40.7%)
Former	451 (53.1%)
Current	53 (6.2%)
Modified Alternative Mediterranean Diet Index tertile
1	323 (38.0%)
2	235 (27.6%)
3	292 (34.4%)
Follow-up time from first appearance of GA (years), mean (SD)	3.1 (1.5)
Eyes	1155
GA prevalent at study baseline or incident during follow-up
Prevalent	433 (37.5%)
Incident	722 (62.5%)
BCVA at first appearance of GA (ETDRS letters), mean (SD)	69.1 (18.7)
Central involvement at first appearance of GA
Central	387 (33.5%)
Non-central	768 (66.5%)
GA area at first appearance of GA (disc areas)
<0.75	778 (67.4%)
0.75 to <1.5	165 (14.3%)
1.5 to <2.0	53 (4.6%)
2.0 to <4	114 (9.9%)
4	45 (3.9%)
GA configuration at first appearance of GA
Small (single patch <1 DA)	575 (49.8%)
Multifocal	267 (23.1%)
Horseshoe or ring	54 (4.7%)
Solid	218 (18.9%)
Indeterminate	41 (3.5%)

Abbreviations: BCVA=best-corrected visual acuity; DA=disc areas; ETDRS=Early Treatment Diabetic Retinopathy Study; GA=geographic atrophy; SD=standard deviation