Abstract
This is a protocol for a Cochrane Review (Intervention). The objectives are as follows: Main objectives To determine the effectiveness of theory‐based and non‐theory based health psychology interventions for improving adherence to maintenance therapy in adults with asthma. Secondary objectives To compare the effectiveness of adherence interventions which are based on theory, as defined by the Theory Coding Scheme (TCS), to interventions which are not theory‐based. To identify and describe, using the TSC and Theoretical Domain Framework (TDF), the different health psychology theories which have been used in interventions to improve adherence to maintenance therapy in adults with asthma. To evaluate the extent to which health psychology theory has been applied to the development of adherence interventions in asthma.