Vacant Lot Greening and Violence-Related Outcomes

A Pilot Randomized Controlled Trial of Vacant Lot Greening and Violence-related Outcomes

The purpose of this study is to determine the impact of vacant lot greening on perceptions of safety and violence for residents living around the lots. We hypothesize that people living around lots that are greened will have improved perception of safety.

Study Overview

• Status: Completed
• Conditions: Violence Prevention; Built Environment

Detailed Description

Violence is a serious health problem in the US, and especially in Philadelphia, as the city ranks first in violent crime amongst the ten largest US cities. The determinants of violent crime range from individual to community level factors. In this study, we focus on physical incivilities in the built environment, specifically vacant lots, as they have been associated with violent crime. Physical incivilities are also associated with individual perceptions of crime and safety, and subsequently, negative health outcomes. However, prior research has been observational and retrospective. We aim to expand this body of work through a randomized community intervention trial of vacant lot greening to explore causal mechanisms between vacant lots and violent crime outcomes. This pilot study, in partnership with the Pennsylvania Horticultural Society, will investigate the feasibility of a vacant lot greening intervention, and explore how vacant lot greening changes resident perception about violence, fear, stress, and neighborhood disorder, as well as violent crime in the surrounding area. We will interview residents living around the greened and non-greened lots during a joint walk around a pre-determined route, which will ensure exposure to our intervention. We will also use violent crime data (homicide, aggravated assault, robbery, and rape) from the Philadelphia Police Department. Results of this pilot trial will be used to develop a full scale vacant lot greening grant to be submitted to the National Institutes of Health or the National Institute of Justice.

• Study Type: Observational
• Enrollment (Actual): 29

Contacts and Locations

Study Locations

• United States
  • Pennsylvania
    • Philadelphia, Pennsylvania, United States, 19104
      • University of Pennsylvania

Participation Criteria

Eligibility Criteria

• Ages Eligible for Study: 18 years to 65 years (ADULT, OLDER_ADULT)
• Accepts Healthy Volunteers: No
• Genders Eligible for Study: All

• Sampling Method: Probability Sample

Study Population

Residents living around two seperate sites (one site where vacant lots are greened and a control site where vacant lots are not greened).

Description

Inclusion Criteria:

• Age 18-65
• Lives in home
• Ability to walk unassisted and without difficulty for 10 blocks

Exclusion Criteria:

• One resident per house

Study Plan

How is the study designed?

Number of groups / cohorts

2

Cohorts and Interventions

Group / Cohort
Greened Vacant Lot; A cluster of vacant lots is greened. People living around this area make up this cohort.
Control Site; The control site is a cluster of vacant lots that will not be greened. The people living around these lots make up the control group.

What is the study measuring?

Primary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Perceptions of safety and violence	We will be performing qualitative interviews to assess perceptions of safety and violence. We will compare these perceptions over time between two groups.	measured twice - once during first month of study and once during 4th or 5th month.

Secondary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Heart Rate	Participants wear a heart rate monitor during a walk around their neighborhood.	measured twice - once during first month of study and once during 4th or 5th month of study
Violent crime statistics	We will obtain crime statistics, including homicide, robbery, rape, and assault in the area around each cluster of vacant lots.	Measured 6 months before intervention and 6 months after intervention
Safe/Unsafe items in the environment	During a walk around the neighborhood, participants will point out items in the environment which they feel are safe or unsafe.	measured twice - once during the first month of the study and once during the 4th or 5th month.

Collaborators and Investigators

• Sponsor: University of Pennsylvania
• Investigators: Principal Investigator: Eugenia C Garvin, MD, University of Pennsylvania

Study record dates

Study Major Dates

• Study Start: April 1, 2011
• Primary Completion (ACTUAL): August 1, 2011
• Study Completion (ACTUAL): September 1, 2011

Study Registration Dates

• First Submitted: April 13, 2011
• First Submitted That Met QC Criteria: April 13, 2011
• First Posted (ESTIMATE): April 15, 2011

Study Record Updates

• Last Update Posted (ESTIMATE): December 5, 2011
• Last Update Submitted That Met QC Criteria: December 2, 2011
• Last Verified: December 1, 2011

More Information

Terms related to this study

• Other Study ID Numbers: 813112