Lötsch, Felix, Auer-Hackenberg, Lorenz, Groger, Mirjam, Rehman, Khalid, Morrison, Valerie, Holmes, Emily, Parveen, Sahdia, Plumpton, Catrin, Clyne, Wendy, Geest, Sabina, Dobbels, Fabienne, Vrijens, Bernard, Kardas, Przemyslaw, Hughes, Dyfrig, and Ramharter, Michael
Objective: The objective of this study was to evaluate adherence and causes for non-adherence to antihypertensive therapy in Austrian patients. A special focus was placed on social parameters and behavioural theories. Methods: Patients were invited via advertisements in community pharmacies in Austria to complete an online survey. Inclusion criteria were an age of 18 years or older, a diagnosis of arterial hypertension and a current prescription of antihypertensive medication. Adherence was measured by the four-item Morisky scale. Non-adherence was defined by at least one point in the Morisky scale. Several demographic, social and behavioural parameters were analysed as potential co-variables associated with adherence. Results: A total of 323 patients completed the online survey, of which 109 (33.7 %) met the criteria for non-adherence. In a multivariable model, self-efficacy and age were associated with adherence, whereas intention and barriers were linked to non-adherence; 56 patients (17.3 %) were classified as intentionally non-adherent. Conclusion: This study demonstrates that non-adherence affects an important proportion of patients in the treatment of arterial hypertension. Young age was a particularly important risk factor for non-adherence, and this patient population is, therefore, in need of special attention. Modifiable risk factors were identified that could help improving the treatment of arterial hypertension and potentially other chronic conditions. [ABSTRACT FROM AUTHOR]