Table 2.
Prevalence of Nonrefractive Visual Impairment (Corrected Visual Acuity <20/40) Among US Adults Aged 20 Years and Older by Age and Race/Ethnicitya
| 1999-2002 | 2005-2008 | ||||
|---|---|---|---|---|---|
| Participants, No. |
Prevalence, % (95% CI)b |
Participants, No. |
Prevalence, % (95% CI)b |
P Value |
|
| Overall | 1177 | 1.4 (1.2-1.6) | 1416 | 1.7 (1.5-2.0) | .03 |
| White non-Hispanic | 593 | 1.2 (1.0-1.5) | 668 | 1.6 (1.3-1.9) | .08 |
| Black non-Hispanic | 240 | 1.9 (1.1-2.7) | 312 | 2.3 (1.6-3.0) | .38 |
| Mexican American | 229 | 1.1 (0.6-1.7) | 288 | 2.2 (1.4-3.0) | .02 |
| Age 20-39 y | 115 | 0.6 (0.3-1.0) | 243 | 1.0 (0.7-1.4) | .09 |
| White non-Hispanic | 30 | 0.5 (0-0.9) | 65 | 0.7 (0.3-1.2) | .008 |
| Black non-Hispanic | 35 | 1.1 (0-2.2) | 56 | 1.4 (0.2-2.5) | .73 |
| Mexican American | 35 | 0.8 (0.3-1.3) | 71 | 1.6 (0.7-2.5) | .11 |
| Age 40-59 y | 90 | 0.4 (0.1-0.8) | 162 | 0.6 (0.3-1.0) | .35 |
| White non-Hispanic | 20 | 0.3 (0-0.7) | 30 | 0.3 (0-0.7) | .91 |
| Black non-Hispanic | 35 | 1.1 (0.2-2.0) | 75 | 1.9 (1.0-2.8) | .21 |
| Mexican American | 25 | 0.7 (0-1.5) | 30 | 1.0 (0.1-1.8) | .36 |
| Age ≥60 y | 972 | 4.5 (3.8-5.1) | 1011 | 4.7 (4.0-5.4) | .67 |
| White non-Hispanic | 543 | 3.9 (3.3-4.6) | 573 | 4.5 (3.6-5.3) | .34 |
| Black non-Hispanic | 170 | 5.8 (3.8-7.8) | 181 | 5.5 (3.4-7.5) | .68 |
| Mexican American | 169 | 4.6 (2.7-6.6) | 187 | 8.9 (4.5-13.3) | <.001 |
a
“Other” race/ethnicity is not reported because of small numbers.
b
Percentage values are weighted according to the US 2000 Census, whereas numbers of participants are unweighted.