TABLE 1.

Census Tract-Level Data

Characteristic	Community
	A	B	C	D
Tract size (in square miles)	0.3	0.8	0.6	0.8
Total population	4,481	6,983	3,200	2,276
Population density	16,014	46,261	36,519	55,870
Housing unit density	7,873	12,766	17,883	46,075
Predominant racial	88.7%	97.2%	96.8%	88%
compositiona	Black	Black	White	White
Sex ratio (males per 100 females)a	72	90.3	91.4	96.7
Median agea	49	35.9	42.5	33.5
At least a high school diploma or GEDa	69.2%	65.5%	83.5%	96.9%
% receive public assistance incomea	4.4%	11.9%	0%	0%
% unemployeda	33.2%	18.8%	6.2%	4.3%
% below federal poverty levela	32.5%	36.5%	10.3%	8.6%
% female-headed householdsa	24.1%	28.4%	12%	4.9%
# of vacant parcelsb	15	121	21	58
# of vacant parcels structurally maintainedc	0	9	0	0
Criminal homicide incidents	0	2	0	0
Aggravated assault incidents	15	96	6	4
All thefts (including motor vehicles)	40	183	166	204
Vandalism and criminal mischief incidents	15	91	50	57
Disorderly conduct incidences	3	37	11	6
Prostitution	0	1	0	0
Sex offenses (including rape)	2	3	0	2
Narcotic violationsd	14	197	18	12
Exposure Indexe	0.8%	0.4%	0.9%	9%
Actively engaged in the	0.53	0.48	0.40	0.44
communityf	(0.09)	(0.10)	(0.08)	(0.08)
Trust people in neighborhoodf	0.60	0.68	0.78	0.65
	(0.12)	(0.13)	(0.10)	(0.11)
Neighbors willing to helpf	0.86	0.91	0.92	0.87
	(0.06)	(0.06)	(0.05)	(0.06)
Neighbors work together for	0.85	0.84	0.72	0.82
improvementf	(0.07)	(0.10)	(0.10)	(0.08)
Feel a sense of belonging in	0.90	0.94	0.94	0.90
neighborhoodf	(0.05)	(0.04)	(0.04)	(0.05)
Ever tested for HIVf	0.56	0.53	0.50	0.53
	(0.11)	(0.13)	(0.11)	(0.10)
HIV incidence (cases)g	< 5	≥ 15	< 5	10–14
Persons living with AIDS (cases)g	< 5	≥ 35	< 5	≥ 35

Note. Data are from the University of Pennsylvania Cartographic Modeling Lab database unless otherwise noted)

^aData from the 2009 American Community Survey five-year estimates;

^bIncludes commercial, residential and industrial parcels;

^cParcels cleaned, greened, and tended in the Pennsylvania Horticultural Society Vacant Land Stabilization program;

^dIncludes narcotic sales, possession, manufacture, and delivery;

^eExposure Index values range from 0% to 100% (lower percentage values indicate that Blacks are less likely to be exposed to or have the potential to interact with Whites in the census tract), calculated from 2008 data;

^fValues are from 2008 data, reported as Mean (Standard Error) calculated as small area estimates from dichotomized responses to the PHMC questions (N = 10,006);

^gData from 2008 from the Philadelphia AIDS Activities Coordinating Office report.

For the acronyms, GED is general education development test certification, HIV is human immunodeficiency virus, and AIDS is acquired immune deficiency syndrome.