Table 6. Ocular surface symptoms in the DED and non-DED groups.

Symptoms	DED group (n = 28)	Non-DED group (n = 42)	P-value*
Dryness	2 (0–2)	0 (0–2)	0.013Δ
Gritty or sandy	2 (1–2)	1 (0–2)	0.086
Burning sensation	0 (0–0)	0 (0–0)	0.224
Sticky	0 (0–1.75)	0 (0–0)	0.289
Watery or teary	1 (0–2)	0 (0–1)	0.012Δ
Redness	0 (0–0)	0 (0–1)	0.502
Crusting on eyelashes	0 (0–0)	0 (0–1)	0.002Δ
Itching	1 (0–2)	0.5 (0–2)	0.615

DED, dry eye disease.

Values are shown as the median (interquartile range).

* P-values were derived from Mann-Whitney U-tests.

^ΔStatistical significance (P < 0.05).