Table 1.

Literature Review Matrix by Predictors and Outcomes.

	All Violent Crime		Violent Crime (Not Homicide or Rape)	Homicide Only	Gun Violence
Parks	Abu-Lughod (‘06) ° ↑ Blair et al. (‘17) ° ~ Brown (‘18) ° ↓	Lee (‘13) ° ~ McCord et al. (‘17) † ↑ Nitkowski (‘17) ° ↓	Boessen et al. (‘18) ° ~ Kim et al. (‘18) ° ↑	Culyba et al. (‘16) ° ↓	DeMotto et al. (‘06) ° ~
Community gardens/greening	Blair (‘14) † ♦ ~ Blair et al. (‘17) ° ~ Gorham et al. (‘09) ° ♦ ~ Heinze et al. (‘18) Δ ↓	Kondo et al. (‘16) Δ ↓ Sadler et al. (‘17) Δ ↓ Wilcox et al. (‘13)		Culyba et al. (‘16) ° ~	Branas et al. (‘11) Δ ↓ Branas et al. (‘16) Δ ↓ Branas et al. (‘18) Δ ♦ ↓ Garvin et al. (‘13) Δ ♦ ~
Vegetated streets and walkways	Auchincloss (‘19) † ~ Burley (‘18) ° ↓ ~ Harris et al. (‘18) † ↓	Harris (‘18) † ♦ ↓ Locke et al. (‘17) Δ ~	Crewe (‘01) † ♦ ↓
Trees and ground cover	Donahue et al. (‘11) ° ~ Gilstad-Hayden (‘15) ° ↓ Kondo et al. (‘17-A) † ↓ Kuo et al. (‘01) † ↓	Li (‘08) ° ~ Lim (‘05) ° ~ Schusler et al. (‘18) ° ~ Snelgrove et al. (‘04) ° ↓	Deng (‘15) ° ~ Donovan et al. (‘12) ° ↓ Wolfe et al. (‘12) ° ↓		Troy et al. (‘12) ° ↓ Troy et al. (‘16) ° ↓ Kondo et al. (‘17-B) † ↓
Undeveloped green areas	Sparks (‘11) ° ~				Kondo et al. (‘15) Δ ~

Study Design: ° Correlational, † Quasi-experimental (pre-post or control group); Δ Greening intervention; ♦ Included a qualitative component; Findings: ↓ Negative relationship between green space and crime; ↑ Positive relationship between green space and crime; ~ Inconclusive or no significant relationship found; Strictly qualitative studies excluded from this matrix but included in Appendix A.