Rheumatoid arthritis

Thinking Outside the Joints: The Impact of Nonarticular Pain on Patient‐Reported Outcomes in a Prospective Longitudinal Real‐World Early Rheumatoid Arthritis Cohort

Arthritis Care Res (Hoboken)Published Prospective cohort study

Authors' conclusion

NAP interferes with key aspects of well-being in early RA. Individuals with NAP experience greater pain interference and impairments in physical and social function

Study context

Population
Newly diagnosed active early rheumatoid arthritis (RA) (symptoms <1 year; CDAI >2.8), followed over the first year; mostly women (66%), mean age 57 (SD 14) years246 (52%) with nonarticular pain (NAP) at baseline
Participants
472 participants
Exposure
Regional NAP and widespread NAP vs no NAP
  • Regional NAPn = 176
  • Widespread NAPn = 70
Outcome
Association of NAP with PROMIS-29 domains (adjusted mean change)
Follow-up
First year
Methodological detailsmulticenter, real-world, longitudinal, mixed models adjusted for sociodemographic and RA characteristics and time-varying CDAI
  • Multicenter
  • Real-world
  • Longitudinal
  • Mixed models adjusted for sociodemographic and RA characteristics and time-varying CDAI

Main finding

As reported in the abstract

Adjusted mean change in PROMIS-29 domains, regional vs no NAP
Each group vs no NAPEstimate (95% CI)
Regional NAP
adjusted mean change, physical function −1.4(−2.1 to −0.7)
Regional NAP
adjusted mean change, pain interference 2.7(1.9–3.5)
Regional NAP
adjusted mean change, sleep disturbance 1.2(0.4–2.0)
Regional NAP
adjusted mean change, fatigue 2.1(1.2–3.1)
Regional NAP
adjusted mean change, anxiety 1.5(0.7–2.4)
Regional NAP
adjusted mean change, depression 1.4(0.5–2.2)
Regional NAP
adjusted mean change, social participation −2.4(−3.3 to −1.5)
Widespread NAP
pain interference 5.0 (95% CI 3.7–6.4)
Widespread NAP
fatigue 3.2 (95% CI 1.7–4.8)
Widespread NAP
social participation −5.6 (95% CI −7.2 to −4.0)

Observational data: associations, not effects.

Original publication

Thinking Outside the Joints: The Impact of Nonarticular Pain on Patient‐Reported Outcomes in a Prospective Longitudinal Real‐World Early Rheumatoid Arthritis Cohort. Arthritis Care Res (Hoboken). Published 2 December 2025. doi:10.1002/acr.25656

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