We found little evidence of effectiveness of HRLAs for promotion of exercise/improved diets .
Conclusions Overall , there is limited evidence suggesting that HRLAs are cost-effective in terms of changing health-related knowledge , behaviours or health outcomes .
The evidence that does exist indicates that HRLAs are only cost-effective when they target behaviours likely to have a large impact on overall health-related quality of life .
Background Development of new peer or lay health-related lifestyle advisor ( HRLA ) roles is one response to the need to enhance public engagement in , and improve cost-effectiveness of , health improvement interventions .
This article synthesis es evidence on the cost-effectiveness of HRLA interventions aim ed at adults in developed countries , derived from the first systematic review of the effectiveness , cost-effectiveness , equity and acceptability of different types of HRLA role .
HIV prevention among drug users: outcome of a network-oriented peer outreach intervention.
A network-oriented HIV prevention intervention based on social identity theory and peer outreach was implemented for HIV positive and negative drug users . A community sample of 250 were r and omly assigned to an  equal-attention control condition or  a  multisession , small-group experimental condition , which encouraged peer outreach ; 94 % of participants were African American , and 66 % used cocaine or opiates . At follow-up , 92 % of participants returned , and experimental compared with control group participants were 3 times more likely to report reduction of injection risk behaviors and 4 times more likely to report increased condom use with casual sex partners . Results suggest that psychosocial intervention emphasizing prosocial roles and social identity , and incorporating peer outreach strategies , can reduce HIV risk in low-income , drug-using communities
We found little evidence of effectiveness of HRLAs for promotion of exercise/improved diets .
Conclusions Overall , there is limited evidence suggesting that HRLAs are cost-effective in terms of changing health-related knowledge , behaviours or health outcomes .
The evidence that does exist indicates that HRLAs are only cost-effective when they target behaviours likely to have a large impact on overall health-related quality of life .
Background Development of new peer or lay health-related lifestyle advisor ( HRLA ) roles is one response to the need to enhance public engagement in , and improve cost-effectiveness of , health improvement interventions .
This article synthesis es evidence on the cost-effectiveness of HRLA interventions aim ed at adults in developed countries , derived from the first systematic review of the effectiveness , cost-effectiveness , equity and acceptability of different types of HRLA role .