Work disability in non-radiographic axial spondyloarthritis patients before and after start of anti-TNF therapy: a population-based regional cohort study from southern Sweden

Methodological aspects of design, analysis and reporting of studies with work participation as an outcome domain in patients with inflammatory arthritis: results of two systematic literature reviews informing EULAR points to consider

Objective

To summarise the methodological aspects in studies with work participation (WP) as outcome domain in inflammatory arthritis (IA) and other chronic diseases.

Methods

Two systematic literature reviews (SLRs) were conducted in key electronic databases (2014–2019): search 1 focused on longitudinal prospective studies in IA and search 2 on SLRs in other chronic diseases. Two reviewers independently identified eligible studies and extracted data covering pre-defined methodological areas.

Results

In total, 58 studies in IA (22 randomised controlled trials, 36 longitudinal observational studies) and 24 SLRs in other chronic diseases were included. WP was the primary outcome in 26/58 (45%) studies. The methodological aspects least accounted for in IA studies were as follows (proportions of studies positively adhering to the topic are shown): aligning the studied population (16/58 (28%)) and sample size calculation (8/58 (14%)) with the work-related study objective; attribution of WP to overall health (28/58 (48%)); accounting for skewness of presenteeism/sick leave (10/52 (19%)); accounting for work-related contextual factors (25/58 (43%)); reporting attrition and its reasons (1/58 (2%)); reporting both aggregated results and proportions of individuals reaching predefined meaningful change or state (11/58 (16%)). SLRs in other chronic diseases confirmed heterogeneity and methodological flaws identified in IA studies without identifying new issues.

Conclusion

High methodological heterogeneity was observed in studies with WP as outcome domain. Consensus around various methodological aspects specific to WP studies is needed to improve quality of future studies. This review informs the EULAR Points to Consider for conducting and reporting studies with WP as an outcome in IA.

The journey of the non-radiographic axial spondyloarthritis patient: the perspective of professionals and patients

OBJECTIVE

Explore the perspective of patients and professionals regarding non-radiographic axial spondyloarthritis (nr-axSpA) and to define the patient's journey from diagnosis to treatment in order to identify unmet needs during the process.

METHODS

A qualitative study was carried out in two phases. In the first part, five focus groups were held with rheumatologists, orthopaedist, physiotherapists, primary care physicians (PCP), radiologists and six narrative interviews with nr-axSpA patients. In the second part, a nominal group meeting was held to detect which needs were not covered in the nr-axSpA (all of whom had collaborated in the previous phase).

RESULTS

The topics discussed with professional groups and patients were the appropriateness of the term and concept of nr-axSpA, the management of low back pain and inflammatory back pain in routine clinical practice, complementary test and the problem of waiting lists and finally the unmet needs both from a practitioner's and a patient's perspective. The final group explored solutions to the problems based on what was discussed in the first part of the project. Some of these solutions were strengthening relations between specialties, implementing high resolution consultations, rethinking the disability scales, offering better information to patients, designing resource maps and using different strategies to promote knowledge of the disease.

CONCLUSION

Many different perspectives on the same disease have revealed the difficult journey of the patient with suspected nr-axSpA, while identifying problems and solutions. Key Points • Diagnosis of nr-AxSpA among health professionals outside rheumatology may lead to numerous turns and difficulties in the patient's journey. • The impact of delays and complications in the journey to diagnosis is not quantified but directly affects the state of well-being and health of patients. • Multidisciplinary care is far from a reality. Primary care (key specialists in any chronic condition), radiologists, orthopaedists, and non-physicians such as physiotherapists and psychologists are generally excluded from dealing with these patients, and often have to do their work outside of physicians, rather than working together in a truly patient-centred medicine.

Work outcome in yet undiagnosed patients with non-radiographic axial spondyloarthritis and ankylosing spondylitis; results of a cross-sectional study among patients with chronic low back pain

Background

To understand the impact of yet undiagnosed non-radiographic axial spondyloarthritis (nr-axSpA) and ankylosing spondylitis (AS) on work outcomes in a cohort of patients with long-lasting chronic low back pain (CLBP).

Methods

Data were used from a primary care CLBP cohort that was established to understand the prevalence of nr-axSpA and AS. Clinical characteristics comprised measures of back pain (visual analogue scale), inflammation (C-reactive protein) and physical functioning (Roland Morris Disability Questionnaire (RMDQ)). Worker outcomes comprised a question on employment and the Work Productivity and Activity Impairment (WPAI) questionnaire, distinguishing absenteeism, presenteeism, and overall work impairment in those employed and activity impairment in all patients. For each disease subgroup, employment ratio compared to the general population was assessed by indirect standardization. Factors associated with work productivity were explored by zero inflated negative binomial (ZINB) regression models.

Results

Patients with CLBP (n = 579) were included (41% male, mean age 36 years), of whom 71 (12%) were identified as having nr-axSpA and 24 (4%) as having AS. The standardized employment ratios were 0.89 (95% CI 0.84–0.94), 0.97 (95% CI 0.85–1.09) and 0.81 (95% CI 0.56–1.06) for patients with CLBP, nr-axSpA and AS, respectively. Scores for the WPAI subdomains were not significantly different between patients with CLBP, nr-axSpA or AS. The ZINB models showed significant associations between visual analog scale (VAS) score for pain and RMDQ and work productivity.

Conclusion

The impact of yet undiagnosed nr-axSpA and AS on patients’ work outcomes was substantial but was not significantly different from those of patients with long-standing CLBP. Variables significantly associated with reduced work productivity were VAS for pain and RMDQ score.

Electronic supplementary material

The online version of this article (doi:10.1186/s13075-017-1333-x) contains supplementary material, which is available to authorized users.