Table 2

Risk of corneal ulcer in the ESRD and control groups

Characteristics	ESRD				Controls				Adjusted IRR (95% CI)	p Value
Characteristics	N	Corneal ulcer	PY	Incidence rate*	N	Corneal ulcer	PY	Incidence rate*	Adjusted IRR (95% CI)	p Value
All	92 967	660	437 014	15.10	92 967	591	602 486	9.81	1.54 (1.38 to 1.72)	<0.001
Age
<50 years	18 015	211	113 070	18.66	18 015	136	129 565	10.50	1.78 (1.43 to 2.21)	<0.001
50–64 years	29 723	254	149 130	17.03	29 723	195	197 547	9.87	1.73 (1.43 to 2.08)	<0.001
≥65 years	45 229	192	174 814	10.98	45 229	260	275 374	9.44	1.18 (0.98 to 1.42)	0.078
Sex
Male	46 039	339	210 426	16.11	46 039	276	293 236	9.41	1.71 (1.46 to 2.01)	<0.001
Female	46 928	321	226 588	14.17	46 928	315	309 250	10.19	1.39 (1.19 to 1.62)	<0.001
Comorbidity
DM	48 928	419	200 149	20.93	10 177	62	58 161	10.66	1.96 (1.50 to 2.56)	<0.001
HIV	19	0	64	0	12	0	63	0	–	–

A Poisson regression analysis was performed to calculate the IRR.
*Incidence rate: per 10 000 PY.
DM, diabetes mellitus; ESRD, end-stage renal disease; IRR, incidence rate ratio; PY, person-years.