For analysis in this 2020 study, conducted during the national response to COVID-19, faith segments were defined based on respondents’ estimates of their average pre-pandemic attendance.

- Practicing Christians are self-identified Christians who say their faith is very important in their lives and have attended a worship service within the past month.

- Non-practicing Christians are self-identified Christians who do not qualify as practicing.

- Churched adults have attended church at least once in the past six months.

- Unchurched adults have not attended church in the past six months.