Mean difference of DASS-21 subsections among MGD groups
| Parameter | t-Test | P value |
| MGD versus non-MGD group | ||
| Depression | 2.20 | 0.031 |
| Anxiety | 3.00 | 0.003 |
| Stress | 0.97 | 0.33 |
| Asymptomatic MGD versus symptomatic MGD | ||
| Depression | 3.5 | 0.01 |
| Anxiety | 3.2 | 0.02 |
| Stress | 1.9 | 0.056 |
MGD, meibomian gland dysfunction.