Table 4. Standardized canonical discriminant function coefficient comparing variables in different scales (variables were adjusted by subtraction of its mean value and division by its standard deviation).

Signs and Symptoms	DF1	DF2	DF3	DF4
TFBUT	0.62	0.45	0.18	0.73
OSDI	-0.48	-0.32	0.68	0.48
CFS	-0.25	0.99	0.16	-0.10
ST	0.21	-0.01	0.74	-0.72

OSDI = Ocular Surface Disease Index; CFS = Corneal Fluorescein Staining; TFBUT = Tear Film Break-Up Time; ST = Schirmer Test