Table 2.

Median survival time and standard error (SE) in days for the primary surgery (PS), needling (N), and bleb revision (BR) group and for the subgroups stand-alone vs. combined primary XEN-45 implantation with cataract extraction using the QS21, QS18, and IoGM success criteria*

	Overall		Stand-alone		Combined
	Median survival		Median survival		Median survival
	Estimate	SE	Estimate	SE	Estimate	SE
Primary surgery	n = 268		n = 193		n = 75
QS21	176	31	155	14	278	47
QS18	151	21	148	9	247	47
IoGM	420	63	405	72	425	105
Needling	n = 55		n = 38		n = 17
QS21	97	22	87	18	125	50
QS18	87	8	86	5	97	31
IoGM	159	45	114	54	161	119
Bleb revision	n = 105		n = 82		n = 23
QS21	423	134	423	156	449	93
QS18	323	101	338	138	323	62
IoGM	673	158	673	18	449	116

SE, standard error

^*QS21 and QS18, postoperative IOP < 21 mmHg and < 18 mmHg together with ≥ 20% IOP reduction; IoGM, 20% or more IOP reduction or reduction in the number of glaucoma medication of 2 or more