Patient Navigation for Lung Cancer Screening at a Health Care for the Homeless Program: A Randomized Clinical Trial.

Importance: People experiencing homelessness die of lung cancer at rates more than double those in the general population. Lung cancer screening (LCS) with low-dose computed tomography (LDCT) reduces lung cancer mortality, but the circumstances of homelessness create barriers to LCS participation. Objective: To determine whether patient navigation, added to usual care, improved LCS LDCT receipt at a large Health Care for the Homeless (HCH) program. Design, Setting, and Participants: This parallel group, pragmatic, mixed-methods randomized clinical trial was conducted at Boston Health Care for the Homeless Program (BHCHP), a federally qualified HCH program that provides tailored, multidisciplinary care to nearly 10 000 homeless-experienced patients annually. Eligible individuals had a lifetime history of homelessness, had a BHCHP primary care practitioner (PCP), were proficient in English, and met the pre-2022 Medicare coverage criteria for LCS (aged 55-77 years, ≥30 pack-year history of smoking, and smoking within the past 15 years). The study was conducted between November 20, 2020, and March 29, 2023. Intervention: Participants were randomized 2:1 to usual BHCHP care either with or without patient navigation. Following a theory-based, patient-centered protocol, the navigator provided lung cancer education, facilitated LCS shared decision-making visits with PCPs, assisted participants in making and attending LCS LDCT appointments, arranged follow-up when needed, and offered tobacco cessation support for current smokers. Main Outcomes and Measures: The primary outcome was receipt of a 1-time LCS LDCT within 6 months after randomization, with between-group differences assessed by χ2 analysis. Qualitative interviews assessed the perceptions of participants and PCPs about the navigation intervention. Results: In all, 260 participants (mean [SD] age, 60.5 [4.7] years; 184 males [70.8%]; 96 non-Hispanic Black participants [36.9%] and 96 non-Hispanic White participants [36.9%]) were randomly assigned to usual care with (n = 173) or without (n = 87) patient navigation. At 6 months after randomization, 75 participants in the patient navigation arm (43.4%) and 8 of those in the usual care-only arm (9.2%) had completed LCS LDCT (P < .001), representing a 4.7-fold difference. Interviews with participants in the patient navigation arm and PCPs identified key elements of the intervention: multidimensional social support provision, care coordination activities, and interpersonal skills of the navigator. Conclusions and Relevance: In this randomized clinical trial, patient navigation support produced a 4.7-fold increase in 1-time LCS LDCT completion among HCH patients in Boston. Future work should focus on longer-term screening participation and outcomes. Trial Registration: ClinicalTrials.gov Identifier: NCT04308226.

Patient navigation to promote lung cancer screening in a community health center for people experiencing homelessness: Protocol for a pragmatic randomized controlled trial.

BACKGROUND: Lung cancer is a major cause of death among people experiencing homelessness, with mortality rates more than double those in the general population. Lung cancer screening (LCS) with low-dose computed tomography (LDCT) could reduce lung cancer deaths in this population, although the circumstances of homelessness present multiple barriers to LCS LDCT completion. Patient navigation is a promising strategy for overcoming these barriers. METHODS: The Investigating Navigation to Help Advance Lung Equity (INHALE) Study is a pragmatic randomized controlled trial of patient navigation for LCS among individuals receiving primary care at Boston Health Care for the Homeless Program (BHCHP). Three hundred BHCHP patients who meet Medicare/Medicaid criteria for LCS will be randomized 2:1 to usual care with (n = 200) or without (n = 100) LCS navigation. Following a structured, theory-based protocol, the patient navigator assists with each step in the LCS process, providing lung cancer education, facilitating shared decision-making visits with primary care providers (PCPs), assisting in making and attending LCS LDCT appointments, arranging follow-up when needed, and offering tobacco cessation support for smokers. The primary outcome is receipt of LCS LDCT at 6 months. Using a sequential explanatory mixed methods approach, qualitative interviews with participants and PCPs will aid in interpreting and contextualizing the trial results. DISCUSSION: This trial will produce the first experimental evidence on patient navigation for cancer screening in a homeless health care setting. Results could inform cancer health equity efforts at the 299 Health Care for the Homeless programs that serve over 900,000 patients annually in the US.