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Enhancing Smoking Cessation in the Homeless Population

17 de noviembre de 2020 actualizado por: University of Minnesota
The goal of this research study is to enhance smoking cessation rates for homeless smokers. The original study design proposed to test the effects of 1) an Intensive Smoking Intervention, and 2) integrating alcohol abuse treatment with smoking cessation We will utilize a 3-group randomized design to test study hypotheses. The three study conditions are 1) Integrated Intensive Smoking plus Alcohol intervention using cognitive behavioral therapy (CBT), CBT-(IS+A); 2) Intensive Smoking Intervention using CBT-(IS); or 3) Usual Care (brief smoking cessation and brief alcohol counseling both based on the United States Public Health Service's Guidelines)-(UC). Due to low enrollment because of the addition of an alcohol use screening criteria, the study was changed to a two arm study and the study time frame changed. The two study conditions are 1) Integrated Intensive Smoking plus Alcohol intervention using cognitive behavioral therapy (CBT), CBT-(IS+A) and 2) Usual Care (brief smoking cessation and brief alcohol counseling both based on the United States Public Health Service's Guidelines)-(UC). The study length is reduced to 26 weeks from 52 weeks. All participants will receive 12-week treatment with nicotine patch plus nicotine gum/lozenge. Counseling will follows the protocol used in a recent study of alcohol dependent smokers and will include weekly individual sessions for 3 months followed by study data collection visits 3 months. Both study conditions will have equal number of study contacts. Study staff will make retention contacts with participants in the community during weeks that do not have study visits scheduled. Primary smoking outcome is cotinine-verified 7-day smoking abstinence at week 26 follow-up while secondary outcome is prolonged smoking abstinence at weeks 12, 16, and 26. Secondary alcohol outcome will be self-reported continuous alcohol abstinence for 90 days at week 26. Recruitment and retention will be enhanced by use of gift cards, bus passes, other non-monetary incentives, attractive intervention materials, collaboration with homeless shelters, and advice from a Community Advisory Board. Participants will be enrolled from homeless shelters and facilities in the 7-county greater Minneapolis/St. Paul metro area. Our power calculation indicates that a sample size of 215 per study condition is needed to detect proposed treatment effects.

Descripción general del estudio

Descripción detallada

To achieve the study goal, we have selected a 3-group randomized clinical trial (RCT) design that includes 1) Usual Care, 2) Intensive smoking cessation, and 3) Integrated Intensive Smoking and Alcohol Intervention. Due to low enrollment because of the addition of an alcohol use screening criteria, the study was changed to a two arm study and the study time frame changed. The two study conditions are 1) Integrated Intensive Smoking plus Alcohol intervention using cognitive behavioral therapy (CBT), CBT-(IS+A) and 2) Usual Care (brief smoking cessation and brief alcohol counseling both based on the United States Public Health Service's Guidelines)-(UC). The study length is reduced to 26 weeks from 52 weeks. Having alcohol treatment added to the smoking intervention will enable us assess whether addressing alcohol abuse will result in improved smoking abstinence, an important scientific question that has never been studied in homeless populations.

Study conditions: Both study conditions have identical number of contacts; we considered a design in which the duration of counseling in the UC will be identical to those in the IS+A condition but decided against this because it will create a usual care condition that exceeds standard practice for brief interventions. We understand that testing hypothesis 3 confounds contact time with treatment content, and hence we will not be able to determine that observed differences in outcome are due to specific treatment components. However, given the current state of knowledge about treating homeless alcohol abusing smokers, we believe it is sufficient to show that our intervention led to improved outcome in this group without knowing if the finding is due to specific intervention content. Subsequent research will be needed to disentangle various intervention components.

All participants will receive 12-week treatment with nicotine patch plus nicotine gum/lozenge. Counseling will include weekly individual sessions for 3 months followed by study data collection visits for 3 months. Each participant will be randomly assigned to a condition, which will dictate their treatment. Each participant will be asked to engage in the therapy assigned to their condition, and work to quit smoking and consuming alcohol over a period of one year.

Tipo de estudio

Intervencionista

Inscripción (Actual)

352

Fase

  • Fase 4

Contactos y Ubicaciones

Esta sección proporciona los datos de contacto de quienes realizan el estudio e información sobre dónde se lleva a cabo este estudio.

Ubicaciones de estudio

    • Minnesota
      • Minneapolis, Minnesota, Estados Unidos, 55414
        • University of Minnesota

Criterios de participación

Los investigadores buscan personas que se ajusten a una determinada descripción, denominada criterio de elegibilidad. Algunos ejemplos de estos criterios son el estado de salud general de una persona o tratamientos previos.

Criterio de elegibilidad

Edades elegibles para estudiar

18 años a 75 años (Adulto, Adulto Mayor)

Acepta Voluntarios Saludables

Géneros elegibles para el estudio

Todos

Descripción

Inclusion Criteria:

  • Currently Homeless
  • Smoked at least 100 cigarettes in lifetime
  • AUDIT score of > or equal to 5, < or equal to 26
  • Aged 18 years or older
  • Willing to attend study sessions and follow other study protocol

Exclusion Criteria:

  • Use of smoking cessation medications or interventions in last 30 days
  • Unstable medical illness that requires immediate medical care
  • AUDIT score of < 5 or > 26
  • Pregnancy or other Nicotine Replacement Therapy (NRT) contraindications
  • Current history or in past 6 months of psychotic disorder or major depressive disorders that is not stable on treatment for past 3 months
  • Cognitive impairment

Plan de estudios

Esta sección proporciona detalles del plan de estudio, incluido cómo está diseñado el estudio y qué mide el estudio.

¿Cómo está diseñado el estudio?

Detalles de diseño

  • Propósito principal: Tratamiento
  • Asignación: Aleatorizado
  • Modelo Intervencionista: Asignación paralela
  • Enmascaramiento: Ninguno (etiqueta abierta)

Armas e Intervenciones

Grupo de participantes/brazo
Intervención / Tratamiento
Comparador activo: Integrated Intensive Smoking + Alcohol
IS+A: 12-week treatment with nicotine patch plus nicotine gum/lozenge. An integrated intensive smoking along with an intensive alcohol intervention covering smoking cessation + alcohol abstinence using cognitive behavioral therapy, CBT, and will include weekly individual sessions for 3 months followed by study data collection visits for 3 months.
12-week treatment with nicotine patch plus nicotine gum/lozenge
Otros nombres:
  • TRN
Intensive alcohol abstinence counseling using CBT will include weekly individual sessions for 3 months followed by monthly booster group sessions for 3 months
Otros nombres:
  • Cognitive Behavioral Therapy, CBT
Comparador de placebos: Usual Care
UC: 12-week treatment with nicotine patch plus nicotine gum/lozenge along with a one time brief smoking cessation and brief alcohol counseling both based on the USPHS's Guidelines
12-week treatment with nicotine patch plus nicotine gum/lozenge
Otros nombres:
  • TRN

¿Qué mide el estudio?

Medidas de resultado primarias

Medida de resultado
Medida Descripción
Periodo de tiempo
CO-verified Smoking Status at 26 Weeks
Periodo de tiempo: 7-day smoking abstinence at week 26 follow-up
Smoking status is verified by measuring the concentration of carbon monoxide (CO) in expired air. Participants with a breath CO content less than or equal to 8 parts per million are characterized as abstinent from smoking for at least 7 days.
7-day smoking abstinence at week 26 follow-up

Medidas de resultado secundarias

Medida de resultado
Medida Descripción
Periodo de tiempo
CO-verified Smoking Status at 12 Weeks
Periodo de tiempo: at weeks 12
Smoking status is verified by measuring the concentration of carbon monoxide (CO) in expired air. Participants with a breath CO content less than or equal to 8 parts per million are characterized as abstinent from smoking for at least 7 days.
at weeks 12

Otras medidas de resultado

Medida de resultado
Medida Descripción
Periodo de tiempo
Self-Reported Continuous Alcohol Abstinence for 30 Days
Periodo de tiempo: at week 26
Participants will use a self-administered timeline-followback instrument, which asks them to retrospectively estimate their alcohol use in the 30 days prior to the report date. Outcome is reported as the mean number of continuous alcohol-free days over the past 30 day period.
at week 26

Colaboradores e Investigadores

Aquí es donde encontrará personas y organizaciones involucradas en este estudio.

Investigadores

  • Investigador principal: Pratt Rebekah, PhD, University of Minnesota

Publicaciones y enlaces útiles

La persona responsable de ingresar información sobre el estudio proporciona voluntariamente estas publicaciones. Estos pueden ser sobre cualquier cosa relacionada con el estudio.

Publicaciones Generales

Fechas de registro del estudio

Estas fechas rastrean el progreso del registro del estudio y los envíos de resultados resumidos a ClinicalTrials.gov. Los registros del estudio y los resultados informados son revisados ​​por la Biblioteca Nacional de Medicina (NLM) para asegurarse de que cumplan con los estándares de control de calidad específicos antes de publicarlos en el sitio web público.

Fechas importantes del estudio

Inicio del estudio

1 de enero de 2015

Finalización primaria (Actual)

31 de octubre de 2018

Finalización del estudio (Actual)

31 de octubre de 2018

Fechas de registro del estudio

Enviado por primera vez

27 de agosto de 2013

Primero enviado que cumplió con los criterios de control de calidad

27 de agosto de 2013

Publicado por primera vez (Estimar)

30 de agosto de 2013

Actualizaciones de registros de estudio

Última actualización publicada (Actual)

19 de noviembre de 2020

Última actualización enviada que cumplió con los criterios de control de calidad

17 de noviembre de 2020

Última verificación

1 de noviembre de 2020

Más información

Esta información se obtuvo directamente del sitio web clinicaltrials.gov sin cambios. Si tiene alguna solicitud para cambiar, eliminar o actualizar los detalles de su estudio, comuníquese con register@clinicaltrials.gov. Tan pronto como se implemente un cambio en clinicaltrials.gov, también se actualizará automáticamente en nuestro sitio web. .

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