Overview
Cigarette smoking is more prevalent (50-70%) in persons living with HIV in the U.S. when compared with the general population and is linked to increased rates of heart disease, lung diseases and infections, and lung cancers. Because of their high levels of nicotine dependence, low quit rates, and familiarity with harm reduction, HIV-positive smokers may view the use of alternative nicotine delivery products, such as electronic cigarettes (ECs), as an attractive option for reducing and eventually stopping combustible cigarette use. However, little is known about the health effects of electronic cigarette use in HIV-positive smokers. Some studies have shown that electronic cigarette use was associated with increased confidence to quit smoking in the general population. The primary objectives of this project are to examine whether HIV-positive smokers, who are unwilling or unable to quit smoking, will substitute an electronic cigarette for regular cigarettes, and to examine whether there are any changes in heart and lung health in HIV-positive smokers who switch from regular cigarettes to electronic cigarettes.
Description
Aims The specific aims are to examine: 1) the feasibility and acceptability of EC distribution in PLWH; 2) the effect of EC use on smoking behaviors; and 3) the change in cardiopulmonary symptoms and biomarkers in smokers who transition from CC to EC use.
Methodology The investigators will enroll 72 HIV-positive smokers, who are not ready or willing to quit smoking, into a 12-week randomized study. Participants will be assigned to one of two groups: 1) to receive 6-weeks of free electronic cigarettes (a standardized form developed by the NIH) and encouraged to use them whenever they would smoke a regular cigarette, or, 2) to continue to smoke their usual brand. At weekly visits for 6 weeks, the investigators will measure EC and (regular) combustible cigarette (CC) use, heart and lung symptoms (such as blood pressure, heart rate, shortness of breath, cough). At baseline (start of study) and the week 6 visit, the investigators will obtain blood and urine samples to look at measures of inflammation and coagulation that are related to heart and lung disease. The investigators will also measure tobacco toxicant exposure levels.
At week 6, all participants will receive advice to stop smoking and a referral to the RI Department of Health Quitline (a state-funded smoking cessation resource/program), if desired.
At week 12, any change in smoking habits, and any attempts to quit smoking will be examined.
Participation Population The investigators will recruit participants (N=72 enrolled) from the Miriam Immunology Center (MIC) and the Providence community using study flyers and active recruitment via a recruitment research assistant (RA) at the Miriam Immunology Center. The Miriam-based RA will review in advance the medical records for the upcoming day's appointment to identify potential participants (HIV-positive smokers). Potential participants will be screened in person at the MIC or screened by phone if they instead choose to call the study phone number for screening. Participants in the clinic and those who respond to advertisements via phone will first be screened using the brief telephone interview form. The phone screen will allow the investigators to determine preliminary eligibility for this study. Upon initial eligibility, individuals will be invited to a baseline assessment interview at the Center for Alcohol & Addiction Studies research lab at 121 South Main Street to further determine study eligibility. The investigators estimate that approximately 140 participants will be screened and consented to enroll a sample of 72 into this study. The telephone screen forms will be destroyed once eligibility is determined.
Eligibility
Inclusion Criteria:
- diagnosed with and engaged in care for HIV (defined as at least one HIV clinic medical appointment within the past six month period)
- at least 18 years of age
- smoke at least 5 cigarettes per day for longer than one year
- exhaled carbon monoxide (CO) level greater than 5 at BL
Exclusion Criteria:
- intention to quit smoking in the next 30 days
- currently using pharmacotherapy for smoking cessation
- currently using electronic cigarettes more than 2 days/week
- unstable medical or psychiatric condition (defined as hospitalization)
- medical contraindications to nicotine (unstable angina, uncontrolled hypertension, or recent cardiovascular event, including hospitalization)
- psychotic symptoms
- substance use disorder other than nicotine dependence
- past-month suicidal ideation or past-year suicide attempt
- pregnant or nursing.