A new UCSF BHHI study challenges common perceptions about homelessness and drug use in California, revealing that only 37% of surveyed unhoused Californians use drugs regularly, while 25% have never used them at all. Methamphetamine, not opioids, is the most commonly used drug, often as a means to stay alert while living on the streets. The study also highlights the complex relationship between addiction and homelessness—while drug use can increase the risk of losing housing, “Homelessness itself increases drug use because people use it as a coping strategy,” said Margot Kushel, MD. With homelessness on the rise and only 7% of respondents in treatment, experts stress that expanding affordable housing and accessible treatment options is crucial to addressing both crises.

Research from UCSF Benioff Homelessness and Housing Initiative reveals that most people experiencing homelessness in California are not illegal drug users—contrary to widespread public perception. These findings challenge common stereotypes and underscore the urgent need for better treatment options and housing solutions across the state. KCBS Radio news anchor Eric Thomas spoke with Margot Kushel, MD, Professor of Medicine and Chief of UCSF’s Division for Health Equity and Society, to dive deeper into the issue.

Tobacco use remains the leading cause of preventable deaths worldwide. Despite efforts by many countries to reduce the impact of tobacco products and lower smoking rates, smoking prevalence is higher among people experiencing homelessness. The reasons are complex and go beyond individual choices, including limited awareness about quitting, restricted access to services, and previous negative experiences. Using the SEM framework, which emphasizes the policy and environmental contexts, this study offers a deeper understanding of the context of the lives women experiencing homelessness. The evidence from this study supports the implementation of gender- and age-appropriate holistic approaches to healthcare and tobacco interventions tailored to this community.

Formerly chronically homeless adults who live in permanent supportive housing (PSH) have a high prevalence of smoking. Smoke-free policies and smoking cessation services are among the most effective tobacco control interventions, but these policies are uncommon in PSH. Researchers outline a protocol for a cluster-randomized wait-list controlled trial to evaluate the efficacy of the same smoke-free home intervention on the primary outcome of voluntary adoption of a smoke-free home.

Over 70% of people experiencing homelessness report current tobacco use, compared to 14% in the general population. One of the structural barriers that hinder cessation attempts among people experiencing homelessness is inadequate access to health care and other smoking cessation services. Researchers in this study aimed to explore tobacco use behaviors and factors influencing acceptability of engaging in a clinical trials. Researchers found that participants had attempted to quit smoking, and were interested in engaging in clinical trials as a method to quit smoking.

The homeless population has a higher prevalence of mental health and substance use problems than the general population. Researchers aimed to examine the prevalence of and factors associated with unmet needs for mental health and substance use treatment in older homeless adults. They used logistic regression to examine factors associated with unmet treatment needs. Researchers found that older homeless adults have a high prevalence of unmet behavioral health treatment needs and need targeted services.

Homelessness and behavioral health issues (mental health and substance use) are intertwined. The UCSF Benioff Homelessness & Housing Initiative held a webinar about this complex bidirectional relationship, along with solutions to this crisis. Margot Kushel, MD, Claudine Sipili, Darrell Steinberg, JD, and Stephanie Welch, MSW, discussed findings from the California Statewide Study of People Experiencing Homelessness (CASPEH), highlighted key policy recommendations, and answered audience questions. Marc Dones moderated the webinar.