Table 3. Study of the relationship between the variables and the GSS result.

Studied variables	Group 1 (XEN®)		Group 2 (trabeculectomy)
	Correlation coefficient	P	Correlation coefficient	P
Age	0.13	0.62	0.19	0.46
Number of topical anti-hypertensive drug required	-0.88	<0.01	-0.59	0.01
Postoperative follow-up time	-0.37	0.14	-0.14	0.59
BCVA	-0.11	0.72	0.01	0.97
IOP	-0.50	0.03	-0.05	0.85

BCVA: Best-corrected visual acuity; IOP: Intraocular pressure.