FRI0586 HOW TO GET FROM THE MULTIDIMENSIONAL HEALTH ASSESSMENT QUESTIONNAIRE TO STANFORD HEALTH ASSESSMENT QUESTIONNAIRE DISABILITY INDEX SCORES IN PATIENTS WITH RHEUMATOID ARTHRITIS, PSORIATIC ARTHRITIS AND AXIAL SPONDYLOARTHRITIS: DEVELOPMENT AND VALIDATION OF A CONVERSION ALGORITHM

Background:In the DANBIO quality registry in Denmark, patients with rheumatoid arthritis (RA) psoriatic arthritis (PsA) and axial spondyloarthritis (axSpA) have reported Patient Reported Outcomes (PROs) including the Stanford Health Assessment Questionnaire Disability Index (HAQ-DI) for nearly twenty years as part of routine care. Patients’ feedback have stressed a need for a shorter registration of disability (1). While the shorter Multidimensional Health Assessment Questionnaire (MDHAQ) is preferred by patients, the original HAQ-DI is the preferred tool in observational studies. Thus, a conversion algorithm between the MDHAQ and HAQ-DI scores is warranted.Objectives:To develop and validate a simple conversion algorithm between MDHAQ and HAQ-DI scores in RA, PsA and axSpA patients.Methods:Patients registered in DANBIO with a diagnosis of RA, PsA or axSpA who had completed both HAQ-DI and MDHAQ simultaneously at a visit +/- 30 days from start of conventional synthetic (cs)DMARD or biological (b)DMARD were eligible for the analysis, and randomly divided into development and validation cohorts stratified by diagnosis. The conversion algorithm was developed in the RA development cohort using linear regression with HAQ-DI as the dependent variable and MDHAQ as the independent variable. The predicted HAQ (pHAQ) scores were then calculated by applying the conversion algorithm to the MDHAQ scores in the RA, PsA and axSpA validation cohorts. The pHAQ was validated against the HAQ-DI in the validation cohorts regarding criterion, correlational and construct validity.Results:We included 8983/4410/1760 patients with RA/PsA/axSpA, respectively. The conversion algorithm pHAQ=0.15+MDHAQ*1.08 had the best fit (R2=0.83) in the RA development cohort.Criterion validity: The correlation coefficients between HAQ-DI/pHAQ and patient global score at baseline were 0.66/0.65. In groups of patients with high and low disability (defined as patient global score ≥50), standardized mean difference was -1.4 for HAQ-DI, and -1.4 for pHAQ.Correlational validity: Correlation coefficients between HAQ-DI/pHAQ and ΔHAQ-DI/ΔpHAQ between baseline and first follow-up visit were r=0.91 and r=0.87, respectively. Correlation coefficients between HAQ-DI/pHAQ and pain score, DAS28CRP and physician global score were 0.63/0.64, 0.55/0.55 and 0.34/0.34, respectively. A Bland-Altman plot showed good agreement of HAQ-DI and pHAQ across all functional states.Construct validity: HAQ-DI/pHAQ at the first follow-up visit after baseline was comparable between Patient Acceptable Symptom State groups (PASS=No: mean 1.17 vs 1.18/PASS=Yes: 0.55 vs 0.60). Similar results were seen for the external anchor (Figure 1).In PsA and axSpA validation cohorts, similar results were found.Conclusion:A conversion algorithm from MDHAQ to HAQ-DI was developed in ≈ 4500 RA patients. In separate large validation cohorts of RA, PsA and axSpA patients, the predicted HAQ calculated from the MDHAQ scores showed good criterion, correlational and construct validity comparable to the original HAQ-DI. The results suggest that for research purposes the MDHAQ can be converted to HAQ-DI if a full HAQ-DI has not been performed.References:[1] Primdahl J. et al. Arthritis Care Res 2019 (in press).Acknowledgments:The authors thank all Danish patients and Departments of Rheumatology, who conscientiously report to the DANBIO registry.Disclosure of Interests:Elisabeth Svensson: None declared, Katja Løngaard: None declared, Lykke Midtbøll Ørnbjerg Grant/research support from: Novartis, Rikke Meincke: None declared, Jens Kristian Pedersen: None declared, Lene Dreyer: None declared, Niels Steen Krogh: None declared, Dorte Vendelbo Jensen: None declared, Merete L. Hetland Grant/research support from: BMS, MSD, AbbVie, Roche, Novartis, Biogen and Pfizer, Consultant of: Eli Lilly, Speakers bureau: Orion Pharma, Biogen, Pfizer, CellTrion, Merck and Samsung Bioepis

Rheumatoid arthritis: profile of patients and burden of caregivers

Objective: to describe the profile of patients with Rheumatoid Arthritis (RA) and their caregivers receiving care at the Rheumatology Outpatient Clinic of a teaching hospital, and evaluate the burden of the caregivers. Method: a cross-sectional study was performed with 41 patients with RA and their caregivers using a questionnaire to identify sociodemographic variables; the Burden Interview Scale and the Stanford Health Assessment Questionnaire. Descriptive analyzes and comparison between clinical-demographic variables and the functional status of patients were performed and the correlation between sociodemographic variables and levels of burden of caregivers was tested. Results: there was a prevalence of female patients (87.8%); a mean age of 64.4 years (±12.9); a mean time for the diagnosis of RA of 13.5 years (±8.5), a prevalence of moderate disability (39.0%); lower disability in the Hygiene domain (1.6; ±0.5) and greater disability in the Other Activities of Daily Life (2.1; ±0.6), Reach (2.0; ±0.7) and Grip (2.0; ±0.7) domains. The caregivers were women (73.2%); aged between 17 and 81 years (mean: 46.8; ±15.1); with a high school education (41.4%). The degree of kinship was 56.2% offspring and 36.6% spouses. Eighteen (44.0%) caregivers suffered burden, nine (22.0%) of whom had mild burden and nine (22.0%) of whom suffered intense burden. There was a higher incidence of intense burden among spouses (12.2%) and mild burden among children (12.2%). Conclusion: the low occurrence of burden among caregivers may be related to the profile of the patients, who presented good levels of independence for self-care. The profile of caregivers and the prevalence of overburdened spouses and offspring shows the need and importance of the implementation of caregiver training by health service professionals to improve care for RA patients.

Persons with Rheumatoid Arthritis Challenge the Relevance of the Health Assessment Questionnaire: A Qualitative Study of Patient Perception

Background. The Stanford Health Assessment Questionnaire-Disability Index (HAQ) is widely used to measure functional ability in persons with Rheumatoid Arthritis (RA). The instrument was developed with limited involvement from persons with RA, and their perception of the instrument has not been studied in depth. The aim of this study was to explore how persons with RA experience the use of the HAQ in care. Methods. Forty persons with RA were purposefully recruited to participate in semi-structured interviews. The interviews were then analyzed qualitatively using thematic analysis. Results. The participants questioned the relevance of the HAQ but nevertheless experienced that the instrument had a profound effect on their understanding of health and how care is delivered. The analysis resulted in three themes: Problems with individual items, meaning of the summative score, and effects on care and health perceptions. Conclusions. To make the HAQ relevant to persons with RA, it needs to be revised or to include an option to select items most meaningful to the respondent. To ensure relevance, the HAQ update should preferably be co-created by researchers, clinicians and persons with RA.

Avaliação da capacidade funcional de idosos na Unidade Básica de Saúde da Família São Geraldo, município de Volta Redonda, RJ.

O envelhecimento faz com que a independência funcional diminua, acarretando consequentemente uma redução da qualidade de vida. A manutenção da capacidade funcional dos idosos é de fundamental importância para realização das atividades básicas e instrumentais da vida diária. O presente estudo possui como objetivo avaliar a capacidade funcional de idosos cadastrados no Programa de Saúde da Família no bairro São Geraldo, no município de Volta Redonda, RJ. Para realizar esta avaliação, foi aplicado o questionário validado HAQ-20 (Stanford Health Assessment Questionnaire) em sua versão brasileira, com uma amostra de n = 40 idosos, sendo estes, o total dos que frequentaram a unidade de saúde em um período estipulado previamente (setembro, 2012). Foram acrescentadas duas variáveis para determinação de gênero e idade e sua relação com a capacidade funcional encontrada. Foi encontrado um total de n = 22 idosos do gênero masculino (55%) e n = 18 idosos do gênero feminino (45%). Em relação à idade, foram divididos em quatro grupos, sendo de 60 a 70 anos, n = 22 idosos (55%); 71 a 80 anos, n = 11 idosos (27,5%); entre 81 e 90 anos n = 5 idosos (12,5%) e dos que eram maiores de 90 anos, n = 2 idosos (5%). Quase 80% dos participantes apresentaram uma boa capacidade funcional, sendo classificados em “sem incapacidade” ou com “alteração leve da capacidade funcional” sendo, portanto, capazes de realizarem de forma adequada as suas atividades do dia-a-dia.

Relationship Between Arterial Stiffness and Stanford Health Assessment Questionnaire Disability in Rheumatoid Arthritis Patients without Overt Arterial Disease

Objective.To quantify the relationship between Stanford Health Assessment Questionnaire (HAQ) disability and arterial stiffness in patients with rheumatoid arthritis (RA).Methods.A consecutive series of 114 patients with RA but without overt arterial disease, aged 40–65 years, were recruited from rheumatology clinics. A research nurse measured blood pressure (BP), arterial stiffness (heart rate-adjusted augmentation index), fasting lipids, glucose, erythrocyte sedimentation rate (ESR), and rheumatoid factor (RF). A self-completed patient questionnaire included HAQ, damaged joint count, EuroQol measure of health outcome, and Godin physical activity score. Multiple linear regression (MLR) adjusted for age, sex, smoking pack-years, cholesterol, mean arterial BP, physical activity, daily fruit and vegetable consumption, arthritis duration, ESR, and RA criteria.Results.Mean age was 54 years (81% women) with a median HAQ of 1.13 (interquartile range 0.50; 1.75). Median RA duration was 10 years, 83% were RF-positive, and median ESR was 16 mm/h. Mean arterial stiffness was 31.5 (SD 7.7), BP 125/82 mm Hg, cholesterol 5.3 mmol/l, and 24% were current smokers. Current therapy included RA disease-modifying agents (90%), prednisolone (11%), and antihypertensive therapy (18%). Arterial stiffness was positively correlated with HAQ (r = 0.42; 95% CI 0.25 to 0.56). On MLR, a 1-point increase in HAQ disability was associated with a 2.8 increase (95% CI 1.1 to 4.4; p = 0.001) in arterial stiffness. Each additional damaged joint was associated with a 0.17 point increase (95% CI 0.04 to 0.29; p = 0.009) in arterial stiffness. The relationship between EuroQol and arterial stiffness was not statistically significant.Conclusion.In patients with RA who are free of overt arterial disease, higher RA disability is associated with increased arterial stiffness independently of traditional cardiovascular risk factors and RA characteristics.