Table 3.

Correlations between insomnia (ISI) and dry eye symptoms and ocular surface findings in this study sample

	Pearson r	Spearman rho
ISI and Ocular Symptoms
DEQ5 (range 0–22)	0.43*	0.45*
OSDI (range 0–100)	0.46*	0.48*
Ocular pain intensity, averaged over past week (range 0–10)	0.39*	0.41*
Hot burning pain (0–10)	0.22*	0.28*
Sensitivity to wind (0–10)	0.31*	0.32*
Sensitivity to light (0–10)	0.36*	0.40*
ISI and Ocular Surface Findings
Tear osmolarity, mOsm/L	0.09	0.03
Tear film breakup time, seconds	−0.03	−0.03
Corneal staining, (0–15)	−0.07	−0.12
Schirmer’s test, mm of moisture	0.001	−0.02
Eyelid vascularity, (0–3)	−0.21*	−0.20*
Meibum quality, (0–4)	−0.13	−0.12

DEQ5=Dry Eye Questionnaire; OSDI=Ocular Surface Disease Index questionnaire

All numbers represent the more severe value in either eye

^*p<0.01