<p>Non-adherence to antiretroviral treatment is a public health problem in developing countries. Antiretroviral treatment adherence status of differentiated service delivery is little studied and the difference between appointment spacing model user and non-user is not studied in Ethiopia. The study aimed to assess antiretroviral treatment adherence status and factors among adult HIV-positives of appointment spacing model users and non-user in north Gondar, Ethiopia.&nbsp;</p>