comparison of abdominal aortic aneurysm growth in adult smoking patients who either switch to iqos, continue smoking, or quit smoking.

Conditions: Smoking; Abdominal Aortic Aneurysm; IQOS Use

Summary: the purpose of this study is to evaluate the reduction of the abdominal aortic aneurysm (aaa) annual growth rate in patients who switch from smoking cigarettes to using iqos as compared to patients who continue to smoke cigarettes. the study also aims to provide context to the scale of reduction in the growth rate, by comparing the aaa annual growth rates for continuing to smoke and switching to iqos with the aaa annual growth rate in smokers who had stopped smoking. the study will further evaluate the effects of switching to iqos on co-morbidities observed in aaa patients that are related to smoking as well as to assess the effects on relevant clinical risk endpoints linked to smoking related diseases.

this is a controlled, open-label, 3-arm parallel group, multi-center study in patients diagnosed with abdominal aortic aneurysm (aaa) to evaluate the aaa annual growth rate in adult smokers randomized to either continue smoking combustible cigarettes (cc) or to switch to iqos and in adults who had stopped smoking, as a non-randomized control arm. this is a descriptive study, designed to gain an understanding of how changes in smoking behaviors impact aaa growth rate and disease progression. therefore, there are no formal statistical hypotheses to be tested. smoking patients with aaa who did not quit smoking after their aaa diagnosis, and who are not intending to quit within the next 6 months will be screened for enrollment and randomization in the cc and iqos arms if all other eligibility criteria are met. smoking patients with aaa who had completely stopped smoking and using of any other tobacco or nicotine-containing products within 2 months of their aaa diagnosis, and are still abstinent at the time of the screening visit and of the baseline visit will be screened to be enrolled in the smoking cessation (sc) arm without randomization.

Eligibility criteria:
general inclusion criteria: * patient diagnosed with aaa (infrarenal, fusiform type) with a current aortic maximum minor-axis diameter of 30 to ≤ 49 mm (in male patient) and 30 to ≤ 44 mm (in female patient). * patient has smoked on average at least 10 commercially available cc per day (no brand restrictions) for at least 5 years prior to aaa diagnosis, based on self-reporting * patient is ready to comply with the study protocol (e.g., to use their assigned product/regimen during the course of the study) inclusion criteria specific to patients screened for enrollment and randomization to the cc or iqos arm: * patient has smoked on average at least 10 commercially available cc per day (no brand restriction) for the last 12 months, based on self-reporting. intermittent attempts to quit smoking not exceeding 2 months or short-term interruption of smoking up to 10 days within the last 12 months will be allowed. smoking status will be verified based on a urinary cotinine test (i.e., cotinine ≥ 200 ng/ml). * not intending to quit smoking within the next 6 months. inclusion criteria specific to patients screened for enrollment into the sc arm: * patient had completely quit smoking and stopped the use of any other tobacco or nicotine-containing products within 2 months after aaa diagnosis, and is still abstinent at screening and at baseline. smoking status will be verified based on a urinary cotinine test (i.e., cotinine \< 100 ng/ml). exclusion criteria: * patient is legally incompetent, physically or mentally incapable of giving consent. * patient is a current or former employee of the tobacco industry or their first-degree relatives (parent and child); patient is an employee of the investigational site or any other parties involved in the study or their first-degree relatives (parent and child). * patient has been previously screened or enrolled in this study or was enrolled in any clinical study within 3 months prior to the screening visit. * female patient who is pregnant or breast-feeding. * patient is ineligible as judged by the investigator to participate in the study for any reason. * patient with acute severe cardiovascular events or respiratory diseases, within the last 3 months; with currently active cancer or history of cancer within the last 5 years; with dissecting aneurysm(s) of the aorta; with infrarenal pseudo-aaa (false aaa); with a diagnosis of copd stage 3 and 4 in the medical history; with a recent (within 1 year) or current history of alcohol or other substance abuse based on self-reporting. * patient with a diagnosis of concomitant genetic diseases such as but not limited to marfan syndrome, loeys-dietz syndrome, vascular ehlers-danlos syndrome, turner syndrome, polycystic kidney disease, noonan syndrome, alagile syndrome, arterial tortuosity syndrome and cutis laxa.