POS0574 FEMALE GENDER AND STRESS ARE MAIN DETERMINANTS OF NON-ADHERENCE AND NEGATIVE ILLNESS PERCEPTION AMONG PATIENTS WITH RHEUMATOID ARTHRITIS: SINGLE CENTRE RESULTS FROM THE PRIME REGISTRY COHORT

Abstract

BackgroundAdherence to medications among patients with RA is traditionally considered to be low. Little is known about the indicators and the outcomes of patients having good adherence to medications among Pakistani RA patients.ObjectivesWe aimed to assess the level of non-adherence and its associations with clinical indicators and outcomes using validated measures in a large consecutive Pakistani RA population. Moreover, we measured illness perception using additional validated tools to help us better understand this concept.MethodsThis was a cross-sectional study conducted using data collected at the time of patient enrolment in the PRIME registry. IRB approval and informed consent was obtained. The clinical variables studied were gender, age, smoking habits, body mass index, education status, marital status, disease duration, Charlson Comorbidity Index. Education status was stratified by whether participants completed secondary (high) school education. Evaluation of disease activity and severity was made as per internationally agreed definitions. To measure adherence, the instrument used in the study was the Urdu version of the General Medication Adherence Scale (GMAS), which has been validated for RA patients. Brief Illness Perception Questionnaire (BIPQ) is the simplified version of the Illness Perception Questionnaire (IPQ). BIPQ is a nine-item scale designed to rapidly assess the cognitive and emotional representations of illness. To facilitate interpretation of results in daily clinical practice and to identify patients with the most negative illness perception, we dichotomized the BIPQ scores using the 75th interquartile range score as cutoff, as previously done.ResultsThe data of consecutive 320 RA patients enrolled in PRIME registry (mean age 37.4±13.4 years, 74% female, disease duration of 73±68 months, 30% rural residents, 32.5% had low education status of ≤primary school, and 35% of the cohort was employed) was reviewed. Thirty six percent of the cohort (n=116) was noted to have non adherence. On multiple logistic regression analysis, a significant association of moderate-severe stress (OR 1.85, CI 1.04-3.2, p=0.03), DAS-28 scores (OR 1.83, CI 1.52-2.21, p<0.001), HAQ scores (OR 1.77, CI 1.07-2.92, p=0.02), deformed joint counts (OR 1.30, CI 1.15-1.46, p<0.001). We further examined the concept of non-adherence among our cohort across three domains or components of GMAS questionnaire individually. Firstly, on multivariate regression analysis showed that non-adherence due to patient behavior had significant association with male gender (OR 0.48, p=0.01), unemployment (OR 1.82, p=0.02), stress (OR 2.17, p=0.001), DAS-28 (OR 1.15, p=0.050), worse HAQ scores (OR 1.83, p=0.005). Secondly, multivariate regression analysis showed that non-adherence due to comorbidity and pill burden was associated with age of onset of arthritis (OR 1.02, p=0.006), DAS-28 (OR 1.18, p=0.03), and HAQ (OR 1.81, p=0.008). Thirdly, multivariate regression analysis showed that cost-related non-adherence had no significant association with patient related demographics and traits, but was noted to have significant association with worse DAS-28 and HAQ scores. The mean total BIPQ score of the cohort was 62±8.8. Twenty six percent of the cohort (n=86) was noted to have the most negative illness perception (BIPQ score of >68). On multiple logistic regression analysis, a significant protective association of male gender (OR 0.24, CI 0.11-0.53, p<0.001) and age of onset of arthritis (OR 0.96, CI 0.94-0.99, p=0.01), along with significant association of worse HAQ scores (OR 3.7, CI 2.2-6.1, p<0.001) was noted with the most negative illness perception.ConclusionNon-adherence is common and its main determinants were female gender and stress, along with associated adverse clinical outcomes. Gender-based discrimination in low socioeconomic states along with associated stress is a plausible explanation.Disclosure of InterestsFarzana Hashmi: None declared, Muhammad Haroon Speakers bureau: Novartis, Roche, Abbvie, Pfizer, Grant/research support from: Abbvie, Pfizer, Sadia Asif: None declared, Saadat Ullah: None declared, Saba Javed: None declared.