Table 3A.

ECP – Cox Proportional Hazard Model for risk of reoperation

	ECP
	Stand-alone ECP		ECP with Phacoemulsification
Multivariable Model	HR (95% CI)	P value	HR (95% CI)	P value
Age	0.99 (0.98 – 1.00)	P=0.046	0.99 (0.99 – 1.00)	P=0.074
Male a	1.04 (0.83 – 1.31)	P=0.730	1.06 (0.96 – 1.18)	P=0.247
Race/ethnicity b
- Non-Hispanic Black	0.99 (0.71– 1.38)	P=0.968	1.68 (1.48 – 1.92)	P<0.001
- Hispanic/Latino	0.84 (0.55 – 1.30)	P=0.445	1.18 (0.97 – 1.44)	P=0.105
- Other e	0.98 (0.51 – 1.87)	P=0.940	1.61 (1.23 – 2.10)	P<0.001
Glaucoma diagnosis c
- Primary angle-closure glaucoma	1.38 (0.72 – 2.64)	P=0.356	1.70 (1.39 – 2.08)	P<0.001
- Normal Tension glaucoma	1.04 (0.32 – 3.35)	P=0.950	0.97 (0.69 – 1.37)	P=0.864
- Pigmentary/Pseudoexfoliation glaucoma	0.53 (0.16 – 1.76)	P=0.304	1.89 (1.46 – 2.45)	P<0.001
- Secondary glaucoma f	1.44 (0.79 – 2.60)	P=0.277	2.06 (1.57 – 2.69)	P<0.001
Glaucoma severity d
- Moderate	1.78 (0.84 – 3.79)	P=0.168	3.21 (2.38 – 4.34)	P<0.001
- Severe	2.35 (0.93 – 5.96)	P=0.122	8.61 (6.43 – 11.54)	P<0.001
Baseline IOP	1.03 (1.01– 1.05)	P=0.010	1.07 (1.06 – 1.08)	P<0.001

Note:

Reference for Multivariate Model: age, gender ((a) reference: female), race ((b) reference: Non-Hispanic White), glaucoma type ((c) reference: Primary open angle glaucoma), severity ((d) reference: mild glaucoma)), and baseline IOP

^(e)Other race = non-Hispanic/Latino Asian, or other

^(f)Secondary glaucoma = glaucoma secondary to medications, trauma, inflammation, unspecified