Prevalence of comorbidities and their associations with health-related quality of life and healthcare expenditures in patients with rheumatoid arthritis.

A substantial number of patients with RA had multiple comorbidities. The comorbidities in RA were associated with poor HRQoL and higher healthcare expenditures. Key Points • The prevalence of comorbidities was significantly higher in RA compared to age- and sex-matched non-RA controls. • RA itself was associated with lower mental and physical health-related quality of life and increase in healthcare expenditures. • A higher number of comorbidities in RA were associated with poorer mental and physical health-related quality of life and increase in healthcare expenditures. • Specific comorbidities such as respiratory conditions and psychological disorders were associated with both health-related quality of life and economic burden in RA.