Intervention tool summary

Use This Tool to

Review one page summaries of common interventions

Identify gaps in the evidence base

Make confident decisions using the best available evidence for homelessness interventions

This tool provides a single, accessible and trusted entry-point to the current body of evidence for homelessness interventions. The tool provides one-page overviews of all the available evidence, including simple ratings for the strength of evidence, cost-effectiveness and impact, as well as detail on what the studies say about each intervention.

Use this tool as a trusted starting point for making evidence-informed decisions.

Explore the interventions

Take a look at everything we know about the current body of homelessness intervention evidence.

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Evidence standards

We apply standards of evidence to each of our tools and maps, which have been co-developed with our partners, The Campbell Collaboration.

Standards of Evidence for the Intervention Tool

Each intervention in the tool has a rating for strength of evidence, cost effectiveness and impact. These ratings represent an aggregate of the studies that have been conducted for that intervention. The thresholds for the ratings are as follows:

Strength of evidence

Considerable reliable evidence:

At least 3 RCTs or 5 other studies with a combined sample size of at least 300
‍

Some reliable evidence:

At least 2 RCTs or 3 other studies with a combined sample size of at least 200
‍

Limited reliable evidence:

At least 1 RCT or 2 other studies with a combined sample size of 100
‍

Insufficient evidence available:

Any other number or combination of studies.

Cost effectiveness

To be determined

Impact

++

3 or more RCTs showing positive effects. No studies showing adverse effects.

+

At least one RCT or 2 other studies showing positive effects and no study showing adverse effects.

+/-

At least 2 RCTs showing insignificant effects.

_

At least one RCT or 2 other studies showing negative effects and no study showing positive effects.

__

3 or more RCTs showing positive effects. No studies showing adverse effects.

N/A

Insufficient evidence available or any other number or combination of studies and findings.