Associations of habitual glucosamine supplementation with incident gout: a large population based cohort study.

Objectives: The association between habitual glucosamine use and incident gout has not been examined in previous studies. We aimed to evaluate the association of habitual use of glucosamine with the risk of gout in general population. Methods: A total of 436,594 participants (55.4% female) without prior gout at baseline who completed a questionnaire on supplementation use, which included glucosamine, in the UK Biobank were enrolled. Incident gout was recorded from self-report, death register, primary care, and hospital admission data. Results: At baseline, 53,433 (22.1%) females and 30,685 (15.8%) males reported habitual glucosamine use. During a median follow-up period of 12.1 years, 1718 (0.7%) females and 5685 (2.9%) males developed gout. After multivariable adjustment for major risk factors, glucosamine use was associated with a significantly lower risk of incident gout in females (hazard ratio [HR], 0.81, 95% confidence interval [CI], 0.71–0.92), but not in males (HR, 1.05, 95% CI, 0.97–1.13), compared with non-use (P-interaction < 0.001). Among females, the inverse association between glucosamine use and gout was stronger in participants with diuretics use (HR, 0.64, 95% CI, 0.50–0.81) than those without diuretics use (HR, 0.89, 95% CI, 0.77–1.03) (P-interaction = 0.015). Moreover, gout genetic risk scores did not significantly modify the association between glucosamine use and the risk of incident gout in males (P-interaction = 0.548) or females (P-interaction = 0.183). Conclusions: Habitual glucosamine use to relieve osteoarthritis pain was related to lower risk of gout in females, but not in males. Highlights: Glucosamine use was associated with lower risk of incident gout in females. The inverse association between glucosamine use and gout was stronger in females with diuretics use. Gout genetic risk scores did not significantly modify the association. [ABSTRACT FROM AUTHOR]