Affiliation:
1. Department of Inflammation Biology, King’s College London, London, UK
2. The Royal Marsden Hospital, Applied Health Research Group, London, UK
3. Guy’s Hospital, Louise Coote Lupus Unit, London, UK
Abstract
ObjectiveThe quality of physician–patient interaction can have a significant impact on medication adherence. Little is known about this relationship in patients with lupus nephritis.MethodsA cross-sectional, quantitative study. Data collected included demographics, current medication, systemic lupus erythematosus disease activity index, medication adherence, beliefs about medicines, shared decision-making, patient–doctor depth of relationship, patient–doctor quality of relationship, interpersonal trust in a physician and illness perceptions.ResultsNinety-eight patients with lupus nephritis completed the questionnaires. Logistic regression indicated that medication adherence was significantly predicted by (a) interpersonal trust in a physician (B = 0.85, Wald 3.94, 95% confidence interval (CI) 1.01, 5.44; P = 0.05); (b) timeline cyclical (B = –0.89, Wald 4.95, 95% CI 0.19, 0.90; P < 0.05) and beliefs about the necessity of medicines (B = 0.75, Wald 4.14, 95% CI 1.03, 4.38; P < 0.05). Mediation analysis showed that beliefs about the necessity of medicines significantly mediated the relationship between trust and medication adherence when adjusted for age (B = 0.48, 95% CI 0.06, 1.08; P < 0.01). A further mediation analysis showed that patient–doctor depth of relationship (B = 0.05, 95% CI 0.01, 0.09; P < 0.001), shared decision-making (B = 0.07, 95% CI 0.01, 0.13; P < 0.001) and patient–doctor quality of relationship (B = 0.08, 95% CI 0.01, 0.16; P < 0.001) significantly mediated the relationship between illness coherence and interpersonal trust in a physician.ConclusionThe findings highlighted two key elements: (a) the importance of trust in relation to medication adherence; and (b) a good understanding of patients’ illness is linked to a better relationship with their doctor and greater participation in shared decision-making which is associated with increased trust. Tailored psycho-educational interventions could contribute to improving the patient–doctor relationship quality, trust and increased shared decision-making, which, in turn, might improve medication adherence in patients with lupus nephritis.