TABLE 4.

Univariate Analysis for Failure

	1st Baerveldt Surgery (n=76)				All Baerveldt Surgeries (n=110)
Risk Factor	N (%) (n=76)	5-Year Cumulative Probability Failure (%)	P *	HR; 95% CI	N (%) (n=110)	5-Year Cumulative Probability Failure (%)	P *	HR; 95% CI
Sex			0.39				0.55
Male	41 (54)	39		0.73; 0.34–1.54	52 (47)	37		0.83; 0.45–1.56
Female	35 (46)	37			58 (53)	41
Age (y)			0.17				0.009
0-5	37 (49)	43		0.38; 0.15–0.99†	53 (48)	45		0.25; 0.11–0.55†
6-10	16 (21)	20		2.80; 0.90–8.70‡	25 (23)	13		5.05; 1.95–13.08‡
11+	23 (30)	49		1.23; 0.54–2.97§	32 (29)	56		1.48; 0.73–3.01§
Ethnicity			0.20				0.14
Caucasian	52 (68)	31		1.62; 0.76–3.76	74 (67)	35		1.59; 0.82–3.09
Non-Caucasian	24 (32)	47			36 (33)	47
Prior glaucoma surgeries			0.18				0.01
None	31 (41)	28		1.69; 0.80–3.55	46 (42)	25		2.41; 1.29–4.49
1 or more	45 (59)	45			64 (58)	49
Preoperative IOP (mm Hg)			0.14				0.53
0-20	24 (32)	55		0.42; 0.18–1.01∥	29 (26)	52		0.70; 0.33–1.46∥
21-30	29 (38)	31		0.78; 0.28–2.18¶	48 (44)	36		0.92; 0.42–2.04¶
31+	23 (30)	28		0.57; 0.24–1.37#	33 (30)	29		0.66; 0.29–1.47#
Preoperative medications			0.44				0.55
0-2	22 (29)	47		0.71; 0.30–1.68	31 (28)	49		0.82; 0.40–1.66
3+	54 (71)	35			79 (72)	36
Procedure			0.45				0.79
Single procedure	62 (82)	39		1.57; 0.57–4.33	88 (79)	39		1.12; 0.51–2.46
Staged procedure	14 (18)	43			23 (21)	40
Concurrent procedure			0.45				0.76
Yes	37 (49)	41		0.75; 0.36–1.58	54 (49)	39		0.91; 0.49–1.69
No	39 (51)	33			56 (51)	38
Type of glaucoma			0.32				0.32
Primary	21 (28)	30		1.48; 0.64–3.40	34 (31)	34		1.38; 0.70–2.70
Secondary	55 (72)	41			76 (69)	41

Statistically significant P<0.05 values are in bold.

^* P-value for Log-rank (Mantel Cox) test for 2 variables or for Log-rank for trend test for 3 variables.

^†Age 0 to 5 versus 6 to 10.

^‡Age 6 to 10 versus 11+.

^§Age 0 to 5 versus 11+.

^‖IOP 0 to 20 versus 21 to 30.

^¶IOP 21 to 30 versus 31+.

^#IOP 0 to 20 versus 31+.

CI indicates confidence interval; HR, hazard ratio; IOP, intraocular pressure.