Table 3.

Univariate analysis of ocular features recorded in the electronic health record system.

Features	Surgical failure ($\text{n}=126$)	Surgical success ($\text{n}=104$)	P value
(19) History of angle surgery (n, %)	11 (8.7)	9 (8.7)	1.000
(20) History of selective laser trabeculoplasty (SLT) (n, %)	44 (34.9)	33 (31.7)	0.712
(21) History of previous trabeculectomy (n, %)	5 (4.0)	5 (4.8)	1.000
(22) Pseudophakia (n, %)	43 (34.1)	36 (34.6)	1.000
(23) Diabetes mellitus (DM) (n, %)	36 (28.6)	35 (33.7)	0.492
(24) Study eye			1.000
Left (n, %)	63 (50.0)	52 (50.0)
Right (n, %)	63 (50.0)	52 (50.0)
Number of pre-operative topical glaucoma medications
(25) (0, 1) (n, %)	7 (5.6)	10 (9.6)	0.359
(26) (2, 3) (n, %)	82 (65.1)	71 (68.3)	0.712
(27) (4, 5) (n, %)	37 (29.4)	23 (22.1)	0.273
(28) Topical beta blocker (n, %)	92 (73.0)	74 (71.2)	0.868
(29) Topical prostaglandin analogue (PGA) (n, %)	103 (81.7)	73 (70.2)	0.057
(30) Topical alpha-agonist (n, %)	62 (49.2)	53 (51.0)	0.895
(31) Topical carbonic anhydrase inhibitor (CAI) (n, %)	67 (53.2)	51 (49.0)	0.623
(32) Oral CAI (n, %)	17 (13.5)	10 (9.6)	0.482
(33) Angle anatomy			0.647
Open angle glaucoma (OAG) (n, %)	113 (89.7)	96 (92.3)
Angle closure glaucoma (ACG) (n, %)	13 (10.3)	8 (7.7)
(34) Pre-operative visual acuity (VA) (Mean, SD)	0.49 (0.6)	0.46 (0.7)	0.720
Pre-operative IOP
(35) < 18 mmHg (n, %)	42 (33.3)	30 (28.8)	0.557
(36) $>=$ 18 and $<=25$ (n,%)	40 (31.7)	34 (32.7)	0.991
(37) $>25$ (n,%)	44 (34.9)	40 (38.5)	0.676
(38) Surgery-trabeculectomy with cataract extraction (n, %)	21 (16.7)	13 (12.5)	0.484
(39) Central corneal thickness (CCT) (Mean, SD)	554.9 (48.3)	548.8 (45.2)	0.326

$\text{n}=\text{number};\text{SD}=\text{standard deviation}$.

The threshold for statistical significance was P $<.05$.