Schizophrenia is highly burdensome, both to patients but also to caregivers of patients with schizophrenia, largely due to the chronic, relapsing nature of the condition. However, caregiver burden imposed by such chronic conditions is often overlooked, and carer perspectives are underrepresented in Health Technology Assessment (HTA) appraisals. The impact of caregiving for a person with schizophrenia is a multidimensional concept. Different instruments are available to evaluate caregivers burden, which vary in their length, domains and population of interests. Therefore, the aim of this study is to define how caregiver burden is currently assessed within the context of schizophrenia.