Early bleb parameters as long-term prognostic factors for surgical success: a retrospective observational study using three-dimensional anterior-segment optical coherence tomography

Table 2 P values calculated by univariable analysis using a Cox proportional hazards model for the surgical success

Parameter	Complete success^a			Qualified success^a
Parameter	< 15 mmHg	< 18 mmHg	< 21 mmHg	< 15 mmHg	< 18 mmHg	< 21 mmHg
Total bleb height	0.8017	0.6070	0.6100	0.5359	0.6149	0.3480
Fluid-filled cavity height	0.2553	0.7886	0.9244	0.1331	0.7217	0.7299
Bleb wall thickness	0.6797	0.6182	0.4898	0.1281	0.6871	0.4319
Bleb wall intensity	0.4804	0.8153	0.9750	0.1281	0.5751	0.7725
Distance from scleral-flap top to filtration opening	0.3486	0.1339	0.1965	0.1870	0.1741	0.1057
Width of filtration openings	0.0143*	0.0272^*	0.0149^*	0.0029**	0.0410*	0.0465^*
Age	0.6705	0.8872	0.8876	0.5536	0.8018	0.7674
Male	0.5002	0.9088	0.9285	0.7957	0.8828	0.8546
Preoperative IOP	0.1032	0.0934	0.1275	0.0763	0.0725	0.1783
Pseudophakia	0.1956	0.5105	0.3705	0.9507	0.5347	0.7422
Design of scleral flap (LB/FB)	0.2807	0.6126	0.4688	0.8881	0.5872	0.5499

^aSurgical failure was defined as an IOP value ≥21 mmHg, ≥ 18 mmHg, or ≥ 15 mmHg with (qualified success) or without (complete success) the use of topical ocular hypotensive medication(s). Complete failure was defined as additional glaucoma surgeries required, hypotony less than 4 mmHg and visual loss. EXG exfoliation glaucoma, FB fornix-based, IOP intraocular pressure, LB limbal-based. *P < 0.05, **P < 0.01

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