Disparity is the condition of being unequal and refers to the difference in outcomes and conditions that exist among specific groups as compared to other groups due to unequal treatment or services. A health disparity is a particular type of health difference that is closely linked with social or economic disadvantage. Health disparities adversely affect people who have experienced greater social or economic obstacles to health based on their racial or ethnic group, religion, socioeconomic status, gender, mental health, physical disability or other characteristics historically linked to discrimination or exclusion.