Abstract
BackgroundDuring the course of rheumatoid arthritis (RA), patients have profound negative effects on their patient-reported-outcomes (PRO); in addition, the impact of sustained remission (SR) on PROs may differ for each particular outcome. The objectives of this study were to identify SR from an inception cohort of RA patients and to examine the impact of SR in an ample spectrum of PROs.MethodsThe study was developed in a well characterized and ongoing cohort of RA patients with recent onset disease recruited from 2004 onwards. In November 2016, the cohort included 187 patients, of whom 145 had at least 30 months of follow-up, with complete rheumatic assessments at regular intervals in addition to a pain visual analogue scale (PVAS), overall disease-VAS (OVAS), health assessment questionnaire (HAQ), Short-Form 36v2 Survey (SF-36) and fatigue assessment. First SR was defined according to the DAS28 cut-offs (DAS28-SR) and ACR/EULAR 2011 Boolean definition (B-SR), if maintained for at least 12 consecutive months. The dependent t test and Mc Nemar’s tests were used for comparisons between related groups. Local IRB approval was obtained.ResultsMore patients achieved DAS28-SR than B-SR: 78 vs. 63, respectively. Fifty patients met both SR definitions. Follow-up to DAS28-SR was shorter than to B-SR and the duration of DAS28-SR was longer, p ≤ 0.023 for all comparisons.At SR, patients had PRO proxy to normal values; the percentage of patients with normal PRO varied from 97% (95% CI: 91–99) for HAQ to 50% (95% CI: 39–61) for absence of fatigue.In DAS28-SR patients, acute reactant phases within the normal range were detected very early (after 1.5–2.9 months). HAQ, PVAS, OVAS and SF-36 were scored within the normal range after 6–7 months. The absence of fatigue was detected at 8.7 months of follow-up, which was similar to DAS28-SR. In the 63 patients with B-SR, a similar pattern was observed. The follow-up to outcomes of the 50 patients who met both SR definitions was similar, but the absence of fatigue and physical component SF-36 normalization were achieved earlier in B-SR patients (p ≤ 0.02).ConclusionsThe impact of SR on PRO differs accordingly to each particular outcome.
Highlights
During the course of rheumatoid arthritis (RA), patients have profound negative effects on their patient-reported-outcomes (PRO); in addition, the impact of sustained remission (SR) on PROs may differ for each particular outcome
The following PROs were evaluated before clinical assessments that were performed by a single rheumatologist: a pain visual analogue scale (P-VAS), overall disease-VAS (O-VAS), health assessment questionnaire (HAQ) [14], Short-Form 36v2 Survey (SF-36) [15, 16] and of fatigue
Followup to disease activity score on 28 joints (DAS28)-SR was shorter than to Boolean definition of sustained remission (B-SR) and the duration of DAS28-SR was longer than the duration of B-SR
Summary
During the course of rheumatoid arthritis (RA), patients have profound negative effects on their patient-reported-outcomes (PRO); in addition, the impact of sustained remission (SR) on PROs may differ for each particular outcome. The objectives of this study were to identify SR from an inception cohort of RA patients and to examine the impact of SR in an ample spectrum of PROs. Clinical remission has become a widely accepted treatment goal in rheumatoid arthritis (RA) patients with early disease. With different levels of stringency [3,4,5]. In RA patients, remission may be operationalized as either a complete absence of disease activity or a level of disease activity that is so low that it is not troublesome to the patient and portends a good prognosis [6].
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