Tophi and frequent gout flares are associated with impairments to quality of life, productivity, and increased healthcare resource use: Results from a cross-sectional survey

Table 5 Mean MCS and PCS values by flare frequency and the presence of tophi, adjusted for age, gender, and length of illness

	Number of self-reported flares in past 12 months
	0/don't recall	1 to 2	3	4 to 5	6+
SF-12 MCS
No tophi	50.44	50.32	50.07	47.35	46.84
Not sure	47.20	47.07	46.83	44.11	43.59
1+ tophi	46.86	46.73	46.49	43.77	43.25
SF-12 PCS
No tophi	44.05	43.72	40.26	39.17	36.08
Not sure	41.06	40.73	37.27	36.17	33.09
1+ tophi	40.20	39.87	36.40	35.31	32.23

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