Table.

Approach for categorizing food outlets

	Dichotomous (0, 1 or more)	0 and tertiles of the remaining non-zero distribution of values	Quartiles of the distribution of values
Chain supermarkets, 1 mi	X
Non-chain supermarkets, 1 mi	X
Mass merchandisers, 1 mi	X
Grocery stores, 1 mi	X
Chain fast food restaurants, 1 mi		X
Non-chain fast food restaurants, 1 mi		X
Convenience stores, 1 mi		X
Relative accessibility supermarkets to fast food, 1 mi		X
Chain supermarkets, 1 mi		X
Non-chain supermarkets, 3 mi		X
Mass merchandisers, 3 mi		X
Grocery stores, 3 mi		X
Chain fast food restaurants, 3 mi		X
Non-chain fast food restaurants, 3 mi			X
Convenience stores, 3 mi			X
Relative accessibility supermarkets to fast food, 3 mi			X