The Correlation between Matrix Metalloproteinase-9 Point-of-Care Immunoassay, Tear Film Osmolarity, and Ocular Surface Parameters

Table 5

Correlation between osmolarity and ocular surface parameters.

	Osmolarity (mOsmol/L)
	R correlation coefficient	value
MMP-9 grade	0.45	0.027
Schirmer’s test I (mm)	0.115	0.594
NIBUT (sec)	0.026	0.905
Corneal staining score	0.299	0.156

MMP-9 = matrix metalloproteinase-9; NIBUT = noninvasive tear break up time. Indicates statistical significance ().