Table 2.

Comparison of incidence rate and HR of ED stratified by age and comorbidity between patients with and without gout.

Variables	Gout						IRR^* (95% CI)	Adjusted HR^† (95% CI)
	No			Yes
	Event, n	Person-years	Rate^#	Event, n	Person-years	Rate^#
All	558	615,265	9.07	186	150,528	12.36	1.35 (1.14–1.59)^***	1.21 (1.03–1.44)^*
Age
≤ 34	36	167,808	2.15	16	41,224	3.88	1.79 (0.99–3.23)	1 (reference)
35–44	108	163,249	6.62	33	39,866	8.28	1.25 (0.85–1.84)	2.59 (1.88–3.56)^***
45–54	216	172,700	12.51	72	42,298	17.02	1.35 (1.03–1.76)^*	4.48 (3.32–6.05)^***
55–64	198	111,508	17.76	65	27,140	23.95	1.33 (1.00–1.76)^*	5.68 (4.17–7.73)^***
Comorbidity^‡
No	329	497,796	6.61	87	99,955	8.70	1.31 (1.04–1.67)^*	1 (reference)
Yes, any	229	117,469	19.49	99	50,573	19.58	1.00 (0.78–1.25)	1.79 (1.53–2.09)^***
Diabetes	102	41,979	24.30	39	16,374	23.82	0.97 (0.67–1.41)
Ischemic heart disease	50	24,533	20.38	36	9905	36.35	1.06 (1.01–1.11)^**
Congestive heart failure	9	3777	23.83	0	1632	0	0.03 (0–10.92)
Hypertension	144	77,679	18.54	64	37,224	17.19	0.99 (0.96–1.02)
Depression	28	10,814	25.89	10	2697	37.08	1.40 (0.68–2.89)
Chronic renal failure	6	3562	16.84	2	1496	13.37	0.78 (0.16–3.88)