Risk factors for prevalence of age-related macular degeneration (AMD), stratified by age group
| Characteristic, n (%) | Any AMD | ||
|---|---|---|---|
| Age groups | |||
| 50–64 | 65–74 | ≥75 | |
| Smoking | |||
| Never | 77 (5.4) | 39 (6.7) | 24 (13.0) |
| Past | 50 (4.4) | 44 (8.5) | 25 (13.1) |
| Current | 29 (5.5) | 15 (10.1) | 4 (16.7) |
| p Value | 0.420 | 0.290 | 0.881 |
| Family history | |||
| No | 134 (5.0) | 75 (7.2) | 40 (11.7) |
| Yes | 9 (6.1) | 12 (14.5) | 8 (33.3) |
| p Value | 0.564 | 0.017 | 0.002 |
Level of significance set at p<0.05; statistical significance tested with χ2 test for contingency tables. Bold signifies statistically significant p value.
Family history, subjects who reported a family history of AMD—family history was defined as having a first-degree relative, that is, parent or sibling with AMD; smoking, smoking status of subjects classified as never (no reported history of smoking), past (past smokers) and current (current smokers).