Table 3

Follow-up gout-related health care resource utilisation and costs

	Total	0–1 Flares	2 Flares	3+ Flares
Resource utilisation	(N=102 703)	(N=89 201)	(N=9714)	(N=3788)
Inpatient stay
n	6245	4972	780	493
%	6.1	5.6	8.0*	13.0*
ER visit
n	7728	5441	1471	816
%	7.5	6.1	15.1*	21.5*
Ambulatory visits
n	85 238	71 839	9632	3767
%	83.0	80.5	99.2*	99.5*
Count of inpatient stays
Mean	0.07	0.06	0.10*	0.17*
SD	0.31	0.28	0.41	0.50
Count of ER visits
Mean	0.09	0.07	0.19*	0.34*
SD	0.35	0.28	0.52	0.83
Count of ambulatory visits
Mean	2.03	1.64	3.87*	6.38*
SD	2.12	1.63	2.43	3.66
Costs	(N=102 703)	(N=89 201)	(N=9714)	(N=3788)
Total costs
Mean	2000	1792	2939*	4490*
SD	10 177	9479	13 766	14 033
Median	245	209	533	1003
Medical costs
Mean	1940	1739	2847*	4361*
SD	10 173	9476	13 764	14 023
Median	201	170	449	864
Inpatient costs
Mean	1386	1268	1897*	2874*
SD	9794	9122	13 358	13 441
Median	0	0	0	0
ER costs
Mean	54	42	114*	195*
SD	299	261	415	577
Median	0	0	0	0
Ambulatory costs
Mean	446	377	782*	1201*
SD	2035	1892	2780	2699
Median	151	128	354	638
Other medical costs
Mean	54	52	54	90*
SD	816	861	363	532
Median	0	0	0	3
Pharmacy costs
Mean	60	53	92*	130*
SD	208	201	226	273
Median	11	9	33	55