Prevalence of drusen by demographic subgroups, stratified by age group
| Characteristic, n (%) | Hard drusen (<63 µm)* | Soft drusen (>125 µm) | ||||
|---|---|---|---|---|---|---|
| Age groups | Age groups | |||||
| 50–64 | 65–74 | ≥75 | 50–64 | 65–74 | ≥75 | |
| Gender | ||||||
| Male | 36 (2.6) | 15 (2.5) | 2 (1.1) | 34 (2.5) | 29 (4.8) | 14 (7.4) |
| Female | 49 (2.9) | 20 (3.1) | 9 (4.3) | 33 (1.9) | 28 (4.3) | 19 (9.1) |
| p Value | 0.702 | 0.515 | 0.047 | 0.289 | 0.688 | 0.533 |
| Education | ||||||
| Primary/none | 18 (3.7) | 13 (3.3) | 4 (3.2) | 9 (1.8) | 20 (5.0) | 5 (4.0) |
| Secondary | 40 (2.9) | 11 (2.5) | 4 (2.6) | 29 (2.1) | 16 (3.7) | 15 (9.9) |
| Tertiary | 27 (2.2) | 11 (2.6) | 3 (2.5) | 29 (2.4) | 21 (5.0) | 13 (10.8) |
| p Value | 0.240 | 0.789 | 0.938 | 0.735 | 0.559 | 0.104 |
| Location | ||||||
| Dublin | 23 (2.8) | 10 (2.6) | 3 (1.9) | 10 (1.2) | 14 (3.6) | 14 (8.9) |
| Other urban | 21 (2.6) | 11 (3.2) | 5 (5.1) | 25 (3.1) | 15 (4.3) | 13 (13.3) |
| Rural | 41 (2.9) | 13 (2.5) | 3 (2.1) | 32 (2.2) | 28 (5.4) | 6 (4.2) |
| p Value | 0.929 | 0.816 | 0.262 | 0.033 | 0.445 | 0.040 |
Level of significance set at p<0.05; statistical significance tested with χ2 test for contingency tables. Bold signifies statistically significant p value.
*More than 10 hard drusen (<63 µm).
Dublin, residence in Dublin city or county; Other urban, residence in other urban, another town or city in the Republic of Ireland; education, level of education; location, location of residence in the Republic of Ireland; primary/none, subjects who did not have education and those with only primary education; rural, residence in rural area in the Republic of Ireland; secondary, subjects who completed a junior certificate or leaving certificate or equivalent; tertiary, subjects who completed a diploma, first degree or higher degree.