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Baseline characteristics of study samples in the AREDS and AREDS2 data
| N = 7803 | n | Mean (SD) or % |
|---|---|---|
| Age | 69.5 (6.2) | |
| Gender | ||
| Female | 4466 | 57% |
| Male | 3337 | 43% |
| Education | ||
| ≤ high | 2369 | 30% |
| > high | 5434 | 70% |
| Smoke | ||
| Never | 3623 | 46% |
| Former | 3752 | 48% |
| Current | 428 | 6% |
| Baseline severity score | 4.2 (2.5) |
