Home > Social and structural factors associated with substance use within the support network of adults living in precarious housing in a socially marginalized neighborhood of Vancouver, Canada.

Knerich, Verena and Jones, Andrea A and Seyedin, Sam and Siu, Christopher and Dinh, Louie and Mostafavi, Sara and Barr, Alasdair M and Panenka, William J and Thornton, Allen E and Honer, William G and Rutherford, Alexander R [PLOS One] . (2019) Social and structural factors associated with substance use within the support network of adults living in precarious housing in a socially marginalized neighborhood of Vancouver, Canada. PLoS ONE, 14 (9) https://doi.org/10.1371/journal.pone.0222611

URL: https://journals.plos.org/plosone/article?id=10.13...

BACKGROUND: The structure of a social network as well as peer behaviours are thought to affect personal substance use. Where substance use may create health risks, understanding the contribution of social networks to substance use may be valuable for the design and implementation of harm reduction or other interventions. We examined the social support network of people living in precarious housing in a socially marginalized neighborhood of Vancouver, and analysed associations between social network structure, personal substance use, and supporters' substance use.

METHODS: An ongoing, longitudinal study recruited 246 participants from four single room occupancy hotels, with 201 providing social network information aligned with a 6-month observation period. Use of tobacco, alcohol, cannabis, cocaine (crack and powder), methamphetamine, and heroin was recorded at monthly visits. Ego- and graph-level measures were calculated; the dispersion and prevalence of substances in the network was described. Logistic mixed effects models were used to estimate the association between ego substance use and peer substance use. Permutation analysis was done to test for randomness of substance use dispersion on the social network.

RESULTS: The network topology corresponded to residence (Hotel) with two clusters differing in demographic characteristics (Cluster 1 -Hotel A: 94% of members, Cluster 2 -Hotel B: 95% of members). Dispersion of substance use across the network demonstrated differences according to network topology and specific substance. Methamphetamine use (overall 12%) was almost entirely limited to Cluster 1, and absent from Cluster 2. Different patterns were observed for other substances. Overall, ego substance use did not differ over the six-month period of observation. Ego heroin, cannabis, or crack cocaine use was associated with alter use of the same substances. Ego methamphetamine, powder cocaine, or alcohol use was not associated with alter use, with the exception for methamphetamine in a densely using part of the network. For alters using multiple substances, cannabis use was associated with lower ego heroin use, and lower ego crack cocaine use. Permutation analysis also provided evidence that dispersion of substance use, and the association between ego and alter use was not random for all substances.

CONCLUSIONS: In a socially marginalized neighborhood, social network topology was strongly influenced by residence, and in turn was associated with type(s) of substance use. Associations between personal use and supporter's use of a substance differed across substances. These complex associations may merit consideration in the design of interventions to reduce risk and harms associated with substance use in people living in precarious housing.


Item Type:Evidence resource
Drug Type:Alcohol or other drugs in general
Intervention Type:AOD disorder harm reduction
Source:PLOS One
Date:September 2019
Page Range:e0222611
Volume:14
Number:9
EndNote:View
Subjects:J Health care, prevention and rehabilitation > Risk and protective factors > Risk factors
L Social psychology and related concepts > Interpersonal interaction and group dynamics > Social support
L Social psychology and related concepts > Physical context or place > Housing
L Social psychology and related concepts > Physical context or place > Housing > Public housing
L Social psychology and related concepts > Inclusion and exclusion
MA-ML Social science, culture and community > Social condition > Poverty
MA-ML Social science, culture and community > Social condition > Homelessness
T Demographic characteristics > Social worker
T Demographic characteristics > Homeless person
VA Geographic area > Canada

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