Table 3 The prevalence of reduced UCDVA in 12 grades
Grade | prevalence | 95% CI |
|---|---|---|
Primary Grade 1 | 59.5% | 59.0–60.0% |
Primary Grade 2 | 49.4% | 48.9–49.9% |
Primary Grade 3 | 34.8% | 34.3–35.3% |
Primary Grade 4 | 38.7% | 38.1–39.2% |
Primary Grade 5 | 44.8% | 44.2–45.3% |
Primary Grade 6 | 52.4% | 51.7–52.9% |
Secondary Grade 1 | 60.9% | 60.3–61.5% |
Secondary Grade 2 | 64.6% | 64.0–65.3% |
Secondary Grade 3 | 72.4% | 71.3–73.5% |
High Grade 1 | 71.2% | 70.3–72.2% |
High Grade 2 | 72.4% | 71.3–73.6% |
High Grade 3 | 80.9% | 78.4–83.3% |