Table 3.
Four-year Incidence of Best corrected Visual Impairment and Blindness Stratified by Age at Baseline in Participants in the Los Angeles Latino Eye Study
| Age at baseline (years) |
Incidence of Visual Impairment | Incidence of Blindness | ||||
|---|---|---|---|---|---|---|
| N | n | % (CI) | N | n | % (CI) | |
| United States Criterion* | ||||||
| 40–49 | 1751 | 8 | 0.5 (0.1, 0.8) | 1754 | 0 | NA |
| 50–59 | 1444 | 6 | 0.4 (0.1, 0.7) | 1446 | 5 | 0.3 (0.0, 0.6) |
| 60–69 | 913 | 15 | 1.6 (0.8, 2.5) | 931 | 3 | 0.3 (0.0, 0.7) |
| 70–79 | 383 | 16 | 4.2 (2.2, 6.2) | 397 | 2 | 0.5 (0.0, 1.2) |
| 80+ | 71 | 10 | 14.1 (6.0, 22.2) | 79 | 2 | 2.5 (0.0, 6.0) |
| P < 0.001 | P < 0.001 | |||||
| Crude Overall | 4562 | 55 | 1.2 (0.9, 1.5) | 4607 | 12 | 0.3 (0.1, 0.4) |
| Age-standardized# | 1.3 (1.0, 1.6) | 0.3 (0.1, 0.5) | ||||
| World Health Organization Criterion† | ||||||
| 40–49 | 1751 | 2 | 0.1 (0.0, 0.3) | 1755 | 0 | NA |
| 50–59 | 1444 | 4 | 0.3 (0.0, 0.5) | 1446 | 4 | 0.3 (0.0, 0.5) |
| 60–69 | 922 | 12 | 1.3 (0.6, 2.0) | 932 | 0 | NA |
| 70–79 | 394 | 9 | 2.3 (0.8, 3.8) | 400 | 1 | 0.3 (0.0, 0.7) |
| 80+ | 74 | 7 | 9.5 (2.8, 16.1) | 81 | 2 | 2.5 (0.0, 5.8) |
| P < 0.001 | P = 0.005 | |||||
| Crude Overall | 4585 | 34 | 0.7 (0.5, 1.0) | 4614 | 7 | 0.2 (0.0, 0.3) |
| Age-standardized# | 0.8 (0.5, 1.1) | 0.2 (0.1, 0.3) | ||||
N= number at risk at baseline; n= incident cases; % (CI)= prevalence and 95 percent confidence interval; P = Test of trend.
U.S. Criterion. Incidence of visual impairment: Person with Baseline best corrected visual acuity (BCVA) of 20/40 or better in better seeing-eye, and follow-up BCVA worse than 20/40 but better than 20/200 (not including 20/40 or 20/200) in better seeing-eye. Incidence of Blindness: Persons with Baseline BCVA better than 20/200 in the better seeing eye and follow-up BCVA 20/200 or worse (including 20/200).
W.H.O. Criterion.Incidence of visual impairment: Persons with Baseline BCVA 20/60 or better in better seeing-eye and follow-up BCVA worse than 20/60 but better than or equal to 20/400 (not including 20/60 but including 20/400) in the better seeing-eye. Incidence of Blindness: Persons with Baseline BCVA 20/400 or better in better seeing-eye and follow-up BCVA worse 20/400 (not including 20/400) in better seeing-eye.
NA: No incident cases.
Age-standardized to the LALES population.