Figure 4.

Trends for gout as a proportion of all ambulatory visits in the US: data from the National Ambulatory Health Care Surveys 1993 to 2009. Trend lines and 95% confidence bands were fitted using fractional polynomial regression. Gout was defined as a physician diagnosis of gout or prescription of allopurinol/colchicine.

Krishnan and Chen Arthritis Research & Therapy 2013 15:R181   doi:10.1186/ar4370
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