Gender Differences in Switching From Smoking Regular Cigarettes to E-Cigarettes

Exclusion Criteria

• •Individuals who report depressive symptoms in the moderately severe or severe range on the PHQ-9 (scores of 15 or above) or who report current suicidal ideation on the PHQ-9
• •Uncontrolled or unstable medical condition (e.g., uncontrolled hypertension, angina, diabetes).
• •Evidence of cognitive deficits or instability that would preclude reliable study participation.
• •Being pregnant, engaging in breast-feeding, or being of childbearing potential and engaging in sexual activity that could lead to pregnancy and is not protected by a medically acceptable, effective method of birth control while enrolled in the study, as determined by self-report. Medically acceptable contraceptives include: (1) approved hormonal contraceptives (such as birth control pills, patches, implants or injections), (2) barrier methods (such as a condom or diaphragm) used with a spermicide, or (3) an intrauterine device (IUD). Contraceptive measures sold for emergency use after unprotected sex are not acceptable methods for routine use.
• •Considered by the investigator to be an unsuitable or unstable candidate (including but not limited to the following situation: unwilling or unable to comply with study procedures)
• •Individuals who reside in an area that is outside of our shipping company's area of operation or in a jurisdiction outside of our medical staff's licensure (if unable to attend in-person clinic visits) AND who decline or are unable to come in to clinic to provide necessary samples and/or collect study products.