Table 4.

Correlations with OSDI in Different Times

Variables	OSDI Score 2–3 Weeks After IPL+LLL		OSDI Score 6 Months After IPL+LLL
	R	P value	R	P value
Severity of dry eye by OSDI 12*	0.603	<0.001	0.346	0.008
Severity of dry eye by ME-CHECK®*	0.533	<0.001	0.472	<0.001
Corneal fluorescein stainingꭞ	0.487	<0.001	0.220	0.096
Previous ocular surgery	0.424	0.001	0.302	0.021
Female gender	0.388	0.002	0.202	0.129
Lowering ocular hypertension drops	0.277	0.030	−0.082	0.541
Previous cataract surgery	0.271	0.033	0.198	0.136
Schirmer testꭞ	−0.245	0.055	−0.197	0.138
Blink rateꭞ	−0.216	0.091	−0.154	0.247
Lipid layer thicknessꭞ	0.214	0.094	−0.042	0.756
Degree of skin pigmentation	−0.212	0.097	0.142	0.287
Tear meniscus heightꭞ	−0.152	0.238	−0.125	0.351
Non-invasive break up timeꭞ	0.137	0.292	0.121	0.366
Area loss of the MGꭞ	0.102	0.429	0.037	0.785
Age	0.075	0.564	−0.126	0.345
Tear osmolarityꭞ	−0.070	0.587	−0.005	0.968

Notes: *Before treatment. ꭞAfter treatment. Bold text represents a statistically significant p-value.

Abbreviations: OSDI, ocular surface disease index; IPL, intense pulsed light therapy; LLL, low level light therapy; MG, meibomian glands.