Table 4 Distribution of DED severity according to study year
1st year | 2nd year | 3rd year | 4th year | 5th year | 6th year | |
|---|---|---|---|---|---|---|
No symptoms of DED | 24.1% | 10.9% | 11.7% | 16.3% | 21.1% | 16.4% |
Mild DED symptoms | 13.8% | 37.0% | 21.7% | 20.9% | 18.4% | 22.3% |
Moderate DED symptoms | 10.3% | 15.2% | 26.7% | 18.6% | 23.7% | 19.0% |
Severe DED symptoms | 51.7% | 37.0% | 40.0% | 44.2% | 36.8% | 42.3% |