Table 3.
Comparison of multimorbidity burden between rheumatoid arthritis (RA) and non-RA patients.
| Chronic conditionsa | Charlson-Deyob | RDCI | ||||
|---|---|---|---|---|---|---|
| Mean (SD) | Ratio (95% CI) | Mean (SD) | Ratio (95% CI) | Mean (SD) | Ratio (95% CI) | |
| Baseline (all patients, n=277,782) | ||||||
| RA | 1.47 (2.00) | 1.68 (1.66, 1.70) | 0.23 (0.58) | 1.32 (1.29, 1.35) | 0.54 (0.96) | 1.39 (1.37, 1.41) |
| Non-RA | 0.88 (1.48) | Ref | 0.18 (0.51) | Ref | 0.39 (0.82) | Ref |
| With ≥1 year of follow-up (n=226,850) | ||||||
| RA | 2.20 (2.28) | 1.66 (1.65, 1.68) | 0.37 (0.72) | 1.37 (1.35, 1.39) | 0.85 (1.15) | 1.42 (1.40, 1.44) |
| Non-RA | 1.33 (1.76) | Ref | 0.27 (0.63) | Ref | 0.60 (0.98) | Ref |
RA and non-RA matched on sex, year of birth, and year of entry into the database
All P < 0.001
a
N=44 chronic conditions
b
Connective tissue disease was not included in scoring
Abbreviations: CI, confidence interval; OR, odds ratio; RA, rheumatoid arthritis; RDCI, Rheumatic Disease Comorbidity Index