A line chart showing the fraction of autism intervention studies that include participant race or ethnicity data. Most studies do not list this crucial information, but the percentage of studies that do has improved over time. In 2017, for example, more than 30 percent of papers provided racial and ethnic information on study participants. In some years, like 1991 and 1995, not a single study provided this information.
Data are based on 1,013 autism intervention studies published between 1990 and 2017. Only 25 percent of these studies, in total, reported any data on race or ethnicity.