Rheumatoid arthritis

Multimorbidity Patterns and Rheumatoid Arthritis Disease Outcomes: Findings From a Multicenter, Prospective Cohort

Arthritis Care Res (Hoboken)Published Prospective cohort study

Authors' conclusion

Mental health and substance abuse, chronic pain, and cardiovascular multimorbidity patterns are associated with increased RA disease activity and poorer functional status.

Study context

Population
Veterans Affairs rheumatoid arthritis (RA) registry participants (88.2% male, 76.9% white, 79.3% smoking history)
Participants
2,956 participants
Exposure
Multimorbidity patterns vs their absence
Outcome
RA disease activity (DAS28) and functional status (MDHAQ), assessed longitudinally
Follow-up
Up to 5 years after enrollment
Methodological detailsmulticentre, generalized estimating equations adjusted for relevant confounders
  • Multicentre
  • Generalized estimating equations adjusted for relevant confounders

Main finding

As reported in the abstract

DAS28 by multimorbidity pattern

β

Mental health and substance abuse
0.12 (95% CI 0.00–0.23)
Cardiovascular
0.25 (95% CI 0.12–0.38)
Chronic pain
0.21 (95% CI 0.11–0.31)
All four patterns
0.59 (95% CI 0.36–0.83)
Number of multimorbidity patterns highly associated with DAS28
P for trend < 0.001

Observational data: associations, not effects.

Further findings

Multidimensional Health Assessment Questionnaire (MDHAQ) by multimorbidity pattern

β (95% CI)
Mental health and substance abuse0.09 (0.03–0.15)
Cardiovascular0.11 (0.04–0.17)
Chronic pain0.15 (0.10–0.20)
All four patterns0.27 (0.16–0.39)
MDHAQ by multimorbidity pattern — Number of multimorbidity patterns highly associated with MDHAQ
P trend < 0.001

MDHAQ by multimorbidity pattern

Metabolic pattern not associated with MDHAQ

Original publication

Multimorbidity Patterns and Rheumatoid Arthritis Disease Outcomes: Findings From a Multicenter, Prospective Cohort. Arthritis Care Res (Hoboken). Published 30 October 2023. doi:10.1002/acr.25184

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