Please select the eligibility criteria that correspond to the clinical trial below.
Title: The Effects of Electronic Cigarette Smoking on the Arterial Wall and Endothelial Glycocalyx Properties of Smokers
Brief Summary: Electronic cigarette is proposed as a bridge to smoking cessation. In this study we examine its effects on aortic elasticity, glycocalyx integrity, and exhaled carbon monoxide (CO) concentration and platelet function, both acutely and after 1 month of use.


Options:
A: Inclusion Criteria:

* Age 18+
* Smoke an average of at least five cigarettes per day for at least 1 year
* Breath CO levels \> 8 ppm (if ≤ 8 ppm, then NicAlert Strip \> 2)

Exclusion Criteria:

* Intention to quit smoking in the next 30 days
* Currently seeking treatment for smoking cessation
* Currently using nicotine replacement therapies or other pharmacotherapies as cessation aid (intermittent use acceptable)
* A quit attempt in the past 30 days resulting in greater than 3 days of abstinence
* Using other tobacco products more than 9 days in the past 30 days
* Significant unstable medical conditions (Any significant change in a serious medical condition occurring during the past 3 months including, cardiovascular disease, COPD, and cancer, as determined by the licensed medical professional at each site)
* Significant unstable psychiatric conditions (Any significant change in psychiatric symptoms during the past 3 months as determined by the licensed medical professional at each site)
* Schizophrenia and schizoaffective disorder
* Psychiatric medication changes in the past 3 months
* Positive toxicology screen for any of the following drugs: cocaine, opiates, methadone, benzodiazepines, barbiturates, amphetamines, methamphetamines, and PCP

  1. Marijuana will be tested for but will not be an exclusionary criterion.
  2. Participants with valid prescriptions for opiates, benzodiazepines, barbiturates, amphetamines or methadone will not be excluded.
  3. Participants failing the toxicology screen will be allowed to re-screen once.
* Blood alcohol level \> 0.01

  a. Participants failing the blood alcohol screen will be allowed to re-screen once.
* Binge drinking alcohol (more than 9 days in the past 30 days, 4/5 in a 2 hour period(female/male))
* Pregnant or breastfeeding
* Smoking 'roll your own cigarettes' exclusively
* Currently taking anticonvulsant medication
* CO reading \>80 ppm
* Systolic BP greater than or equal to 160

  a. Participants failing for blood pressure will be allowed to re-screen once.
* Diastolic BP greater than or equal to 100

  a. Participants failing for blood pressure will be allowed to re-screen once.
* Systolic BP below 90

  a. Participants failing for blood pressure will be allowed to re-screen once.
* Diastolic BP below 50

  a. Participants failing for blood pressure will be allowed to re-screen once.
* Heart rate greater than or equal to 115bpm

  a. Participants failing for heart rate will be allowed to re-screen once.
* Heart rate lower than 45bpm

  a. Participants failing for heart rate will be allowed to re-screen once.
* Indicating any suicidal ideation in the past month or suicide attempts in the past 10 years
* Inability to independently read and comprehend the consent form and other written study materials and measures
* Having participated in a research study during the past three months in which the participant:

  1. Smoked a cigarette that was not his/her usual brand cigarette for more than one day
  2. Used any tobacco products beyond normal use for more than one day
  3. Used any nicotine replacement products or smoking cessation medications for more than one day
B: Inclusion Criteria:

* smokers (at least 10 cigarettes/ day for the past year)
* willing to attempt quit smoking by using the National Health Service smoking cessation services or via e-cigarette use.

Exclusion Criteria:

* Non-ambulant people and people with a recent (e.g. within 6 months) cardiovascular disease event (e.g. stroke, myocardial infarction) or cardiac surgery,
* people with insulin-controlled diabetes mellitus or with coexisting skin conditions, leg ulcers, vasculitis or deep venous occlusion (as these may affect their cardiovascular function),
* pregnant women,
* people who require major surgery (which will prevent them of taking part in the study)
* people who following referral to the smoking cessation services, are advised that Nicotine Replacement Therapy is not appropriate for them,
* people who are currently using e-cigarettes on a daily basis, or currently undertaking an attempt within a smoking cessation service,
* people who are judged to be unable or are unwilling to give informed consent.

The study team will assess prospective participants and will not include in the study those who appear too frail or have health problems (e.g. dementia, Alzheimer's etc.) that might prevent them of giving a conscious, informed consent.
C: Inclusion Criteria:

* Active conventional cigarette smoker

Exclusion Criteria:

* Health condition adversely affected by smoking, history or presence of cardiovascular disease
D: Inclusion Criteria:

* \> 21 years of age
* Smoked cigarettes on \> 25 of past 30 days
* Smoked \> 5 cigarettes per day on days smoked
* Smoked cigarettes \> 6 months
* Carbon monoxide \> 5 PPM at baseline
* Hispanic/Latino or African American/Black
* Fluent in English or Spanish
* Willing to switch from smoking cigarettes to ECs for 6 weeks
* Regular access to telephone
* Transportation to attend appointments (KC Only)

Exclusion Criteria:

* Primary use of other tobacco products or equal use of cigarettes and other tobacco products
* Electronic cigarette use on \> 4 of the past 30 days
* Currently in a smoking cessation program or another clinical trial
* Use of nicotine replacement therapy or medication which aids smoking cessation in the past 30 days
* Hospitalization for a psychiatric issue in the past 30 days
* Heart-related event in the past 30 days. Examples include heart attack, stroke, severe angina (i.e. chest pain), ischemic heart disease, and vascular disease
* Uncontrolled blood pressure at baseline
* Planning to move out of San Diego or Kansas City in the next 6 weeks
* Another person in the household enrolled in the study
* Women: pregnant, breastfeeding, or planning to become pregnant in the next six months
* Unstable mental status or health status

Answer: C