Table 4.

Univariate Hazard Ratios for the Risk of Developing CLPC

	Hazard Ratio	95% Confidence interval
Age	1.01	0.98	1.03
Female (referent group male)	1.08	0.57	2.03
Asian (referent group Caucasian)	1.31	0.56	3.06
African American	1.71	0.90	3.37
Other (ethnicity)	1.50	0.52	4.30
Smoker (referent group non- smoker)	1.27	0.54	2.98
College degree (referent group high school)	1.45	0.72	2.90
Graduate degree	1.31	0.67	2.56
Difference in curvature	0.97	0.31	3.07
Presence of lid bioburden	0.71	0.35	1.42
Presence of conjunctival bioburden	1.22	0.55	2.71
Presence of contact lens bioburden	0.79	0.40	1.54
Neophyte	1.54	0.84	2.82
Previous adverse events	1.26	0.73	2.18