Abstract
ObjectivesThe association between gout and risk of cognitive impairment or dementia is not well established. We examined the relationship between having gout at midlife and the risk of developing cognitive impairment later on. MethodsWe used data of 16,948 participants from the population-based Singapore Chinese Health Study cohort. Participants were recruited from 1993 to 1998 at mean age of 53 years and re-contacted for three follow-up interviews: 1999 to 2004 for follow-up 1, 2006 to 2010 for follow-up 2, and 2014 to 2016 for follow-up 3. History of physician-diagnosed gout was self-reported at follow-up 1 and follow-up 2, while cognitive function was assessed with the Singapore modified Mini-Mental State Examination during follow-up 3, when participants had a mean age of 73.2 years. ResultsGout was reported by 1281 (7.6%) participants at either follow-up 1 or 2, and 2243 (14.4%) had cognitive impairment at follow-up 3. A history of gout was associated with reduced risk of cognitive impairment (OR 0.78, 95% CI 0.65–0.93). This risk was reduced in a stepwise manner with either increased duration of gout or lower age at first diagnosis of gout (Ptrend <0.001). Compared to those without gout, those with gout for ≥20 years (OR 0.56, 95% CI 0.39–0.80) and those with age of onset of gout <50 years old (OR 0.59, 95% CI 0.37–0.94) had a lower risk of developing cognitive impairment. ConclusionA young age of onset or a long history of gout was associated with reduced risk of cognitive impairment in late life.
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