Trajectories of pain predict disabilities affecting daily living in arthritis.

These findings highlight how, for some people, alleviating pain, the main symptom of arthritis, might not prevent the persistence or progression of disability. Even when pain improves, further interventions that improve disability are likely to be required. Statement of contribution What is already known on this subject? Pain and functional limitation in daily living are common symptoms of arthritis. Arthritis pain is heterogeneous - there are trajectories of people whose pain gets better or worse. However, to date no study has looked at the relationship between trajectories of arthritis pain and functional disability outside of the minority of people with rheumatoid arthritis. What does this study add? Treating pain as heterogeneous explained disability better than treating pain as a single entity. Respondents in a trajectory of worsening pain reported functional disability in two domains (mobility and activities of daily living) also got worse over time. People in a trajectory of decreasing pain over time did not experience a reduction in disability, despite pain being the most common reason for why people limit their daily functioning. This suggests further intervention is required for people with arthritis, even when the most visible symptoms have been alleviated.