[Cost of illness in axial spondylarthritis for patients with and without tumor necrosis factor inhibitor treatment: results of a routine data analysis]

[Celebrating 33 years of the DRFZ: Epidemiology and Health Services Research]

Der wissenschaftliche Fokus des Programmbereichs Epidemiologie und Versorgungsforschung des DRFZ liegt einerseits auf der Erforschung der Versorgungssituation rheumakranker Menschen in Deutschland einschließlich ihrer Defizite, Fortschritte und zeitlichen Trends. Andererseits ist ein wesentliches Ziel, durch die langfristige Beobachtung von Krankheitsverläufen in großen Kohorten Risikofaktoren für ungünstige Krankheitsverläufe, aber auch protektive Faktoren aufzudecken. Mit der Zulassung innovativer, zielgerichteter Therapien zu Beginn dieses Jahrtausends wurde die Thematik der Sicherheit und Wirksamkeit der verschiedenen antirheumatischen Therapien unter Alltagsbedingungen zu einer für Ärzte und Patienten vorrangigen Frage. Die Biologika-Register entwickelten sich zu zentralen Instrumenten des Programmbereichs, mit denen Fragen zur vergleichenden Therapiesicherheit, aber auch zur Therapiewirksamkeit und Reduktion von Risiken durch wirksame Therapie, belastbar beantwortet werden können.

Im vorliegenden Artikel werden ausgewählte Ergebnisse epidemiologischer Forschung am DRFZ dargestellt. Das übergreifende Ziel der Forschung war und ist es, zur Verbesserung der Lebensqualität rheumakranker Kinder und Erwachsener beizutragen. Dem dient die klinisch-evaluative Versorgungsforschung ebenso wie die Gewinnung von Erkenntnissen, die eine wirksame, individualisierte Therapie unterstützen. Als unverzichtbare Instrumente haben sich große, langfristige Patientenkohorten und ein stabiles Netzwerk mit den klinisch tätigen Rheumatologen und Betroffenen erwiesen.

[Spondyloarthritis in childhood and adulthood]

Axial spondylarthritis in adulthood (SpAA) is frequently initially manifested as a sacroiliitis, whereas this not true for enthesitis-related arthritis (EAA), which begins in childhood and adolescence. Classically, EAA begins with peripheral arthritis and only a part transitions into a juvenile SpA (jSpA) or SpAA. The criteria used for classification of SpAA and EAA are currently being validated and revised. For the first time imaging is included for EAA. For both diseases nonsteroidal anti-inflammatory drugs (NSAID) are initially used therapeutically, followed by biologicals or synthetic targeted disease-modifying drugs in refractory courses. Steroids should be avoided in long-term treatment. For optimal transition and further care in adulthood, a close cooperation between internistic and pediatric rheumatologists is necessary.

The Association Between TNF Inhibitor Therapy Availability and Hospital Admission Rates for Patients with Ankylosing Spondylitis. A Longitudinal Population-Based Study

BACKGROUND

TNF inhibiting drugs (TNFi) provide symptomatic relief for patients with ankylosing spondylitis (AS), but uncertainty remains about long-term benefits. We compared hospital admissions, emergency department (ED) presentations, and direct health care costs before and after the availability of subsidized TNFi therapy for AS patients.

METHODS

State-specific dispensing and cost data for TNFi therapy for AS in Western Australia (WA) were obtained from Pharmaceutical Benefits Scheme (PBS) and expressed as the number of defined daily doses (DDD)/1000 population/day. Linked admission and ED data for 1783 AS patients followed for 14,257 person-years between 1990 and 2015 were extracted. Pre- and post-2005 admission rates/100,000 population were compared by rate ratio (RR).

RESULTS

TNFi uptake in WA reached a DDD/1000 population/day 0.45 at an annual cost of AU$17.7 million in 2020. Hospital admission rates remained unchanged (RR: 0.95, CI 0.71-1.27, p = 0.66) but increased slightly in female patients (RR 1.22; CI 0.91-1.64, p = 0.20). While there was no change in cardiovascular admissions (6.3 vs. 6.2%, p = 0.6) or ED visit rates since 2005, frequency for cancer (2.7 vs. 3.8%, p < 0.01), infection (1.1 vs. 1.7%, p < 0.01) and mental health (4.0 vs. 4.5%, p < 0.02) admissions increased. Associated direct health care costs (2020 values) averaged AU$14.7 million before and AU$ 24.7 million per year after 2005.

CONCLUSIONS

The introduction of subsidized TNFi therapy did not change all-cause hospital admission or ED visit rates for existing AS patients. Whether the significantly increased direct health care costs are offset by reductions in other health care costs remains to be determined.

[Development of quality standards for patients with axial spondyloarthritis for use in Germany]

Quality standards (QS) are measurable constructs designed to quantify gaps in care and subsequently to improve quality of care. The Assessment of SpondyloArthritis International Society (ASAS) recently generated and published international QS for the management of patients with axial spondyloarthritis (axSpA) for the first time. The German Society of Rheumatology (DGRh) then decided to translate, review and possibly adopt these standards by a group of experts from different care settings. Against this background, national QS for the management of patients with axSpA for Germany were developed for the first time. The main focus was on feasibility and practical relevance. Ultimately, nine QS were defined with which the quality of care in Germany can and should be measured and improved.

Prescription of analgesics in patients with rheumatic diseases in Germany : A claims data analysis

Objective

To investigate the prescription frequency of analgesics in persons diagnosed with rheumatoid arthritis (RA), axial spondylarthritis (axSpA), psoriatic arthritis (PsA) and systemic lupus erythematosus (SLE) in 2019 using claims data.

Methods

Persons ≥ 18 years insured in 2019 with a diagnosis of RA (M05, M06), axSpA (M45), PsA (M07.0-3) or SLE (M32.1,8,9) were included. Analgesics were identified by the anatomic therapeutic classification (ATC) system. Reported is the percentage of individuals with ≥ 1 analgesics prescription for the respective rheumatic diagnosis in 2019 and for opioids age-standardized in each of the years 2005–2019. In addition, the proportion of long-term opioid use (prescriptions in ≥ 3 consecutive quarter years) in 2006 and 2019 is compared.

Results

Metamizole (29–33%) was the most commonly prescribed analgesic. Nonsteroidal anti-inflammatory drugs (NSAID)/coxibs were prescribed from 35% (SLE) to 50% (axSpA). Of the patients 11–13% were prescribed weak and 6–8% strong opioids. From 2005 to 2019, the proportion of persons with an opioid prescription remained stable, with similar or slightly decreasing proportions of weak opioids and more frequent prescriptions of strong opioids. The proportion of long-term opioid prescriptions increased from 2006 to 2019 from 8.9% to 11.0% (RA), from 6.9% to 9.1% (axSPA), from 7.8% to 9.5% (PsA), and from 7.5% to 8.8% (SLE), corresponding to a 17–24% increase.

Conclusion

The prescription of opioids for persons with inflammatory rheumatic diagnoses is not as high in Germany as in other countries; however, the proportion of long-term prescriptions has considerably increased. The frequent prescription of metamizole is conspicuous.

[Prescription of analgesics in patients with rheumatic diseases in Germany : A claims data analysis. German version]

OBJECTIVE

To investigate the prescription frequency of analgesics in persons diagnosed with rheumatoid arthritis (RA), axial spondylarthritis (axSpA), psoriatic arthritis (PsA) and systemic lupus erythematosus (SLE) in 2019 using claims data.

METHODS

Persons ≥ 18 years insured in 2019 with a diagnosis of RA (M05, M06), axSpA (M45), PsA (M07.0-3) or SLE (M32.1,8,9) were included. Analgesics were identified by the anatomic therapeutic classification (ATC) system. Reported is the percentage of individuals with ≥ 1 analgesics prescription for the respective rheumatic diagnosis in 2019 and for opioids age-standardized in each of the years 2005-2019. In addition, the proportion of long-term opioid use (prescriptions in ≥ 3 consecutive quarter years) in 2006 and 2019 is compared.

RESULTS

Metamizole (29-33%) was the most commonly prescribed analgesic. Nonsteroidal anti-inflammatory drugs (NSAID)/coxibs were prescribed from 35% (SLE) to 50% (axSpA). Of the patients 11-13% were prescribed weak and 6-8% strong opioids. From 2005 to 2019, the proportion of persons with an opioid prescription remained stable, with similar or slightly decreasing proportions of weak opioids and more frequent prescriptions of strong opioids. The proportion of long-term opioid prescriptions increased from 2006 to 2019 from 8.9% to 11.0% (RA), from 6.9% to 9.1% (axSPA), from 7.8% to 9.5% (PsA), and from 7.5% to 8.8% (SLE), corresponding to a 17-24% increase.

CONCLUSION

The prescription of opioids for persons with inflammatory rheumatic diagnoses is not as high in Germany as in other countries; however, the proportion of long-term prescriptions has considerably increased. The frequent prescription of metamizole is conspicuous.

Factors Associated with Survey Non-Response in a Cross-Sectional Survey of Persons with an Axial Spondyloarthritis or Osteoarthritis Claims Diagnosis

Non-response in surveys can lead to bias, which is often difficult to investigate. The aim of this analysis was to compare factors available from claims data associated with survey non-response and to compare them among two samples. A stratified sample of 4471 persons with a diagnosis of axial spondyloarthritis (axSpA) and a sample of 8995 persons with an osteoarthritis (OA) diagnosis from a German statutory health insurance were randomly selected and sent a postal survey. The association of age, sex, medical prescriptions, specialist physician contact, influenza vaccination, hospitalization, and Elixhauser comorbidity index with the survey response was assessed. Multiple logistic regression models were used with response as the outcome. A total of 47% of the axSpA sample and 40% of the OA sample responded to the survey. In both samples, the response was highest in the 70-79-year-olds. Women in all age groups responded more often, except for the 70-79-year-olds. Rheumatologist/orthopedist contact, physical therapy prescription, and influenza vaccination were more frequent among responders. In the logistic regression models, rheumatologist/orthopedist treatment, influenza vaccination, and physical therapy were associated with a higher odds ratio for response in both samples. The prescription of biologic drugs was associated with higher response in axSpA. A high Elixhauser comorbidity index and opioid use were not relevantly associated with response. Being reimbursed for long-term care was associated with lower response-this was only significant in the OA sample. The number of quarters with a diagnosis in the survey year was associated with higher response. Similar factors were associated with non-response in the two samples. The results can help other investigators to plan sample sizes of their surveys in similar settings.