Table 1 Number of block groups audited by racial distribution and poverty rate (n  =  210).

Percentage of residents living in poverty	Proportion of African–American residents >50%	Proportion of white residents >50%
Low poverty rate (<10%)	30	30
Medium poverty rate (10–19%)	30	30
High poverty rate (⩾20%)	60*	30

*The number of block groups considered African–American, high poverty is higher because a majority of Garden of Eden participants resided in these block groups and we wanted to ensure the capture of most of the block groups with Garden of Eden participants.