Table 3

Comparison of multimorbidity burden between RA and non-patients with RA

Chronic conditions*Charlson-Deyo Comorbidity Index†RDCI
Mean (SD)Ratio (95% CI)Mean (SD)Ratio (95% CI)Mean (SD)Ratio (95% CI)
Baseline (all patients, n=277 782)
 RA1.47 (2.00)1.68 (1.66 to 1.70)0.23 (0.58)1.32 (1.29 to 1.35)0.54 (0.96)1.39 (1.37 to 1.41)
 Non-RA0.88 (1.48)Ref0.18 (0.51)Ref0.39 (0.82)Ref
With1 year of follow-up (n=226 850)
 RA2.20 (2.28)1.66 (1.65 to 1.68)0.37 (0.72)1.37 (1.35 to 1.39)0.85 (1.15)1.42 (1.40 to 1.44)
 Non-RA1.33 (1.76)Ref0.27 (0.63)Ref0.60 (0.98)Ref
  • RA and non-RA matched on sex, year of birth, and year of entry into the database.

  • All p<0.001.

  • *n=44 chronic conditions.

  • †Connective tissue disease was not included in scoring.

  • RA, rheumatoid arthritis; RDCI, Rheumatic Disease Comorbidity Index.