Similar to the framework used by Harrell et al. positive (e.g., negative affect reduction, stimulation/state enhancement, stress reduction) and negative consequences (e.g., cost, addiction) associated with e-cigarette use will be evaluated using a 15-item questionnaire derived from the Smoking Consequences Questionnaire-Adult (SCQ-A). In addition items related to having had cancer were included in the questionnaire in line with prior research (e.g., "E-cigarettes help me reduce cancer-related stress."). Response options range on a 7-point Likert scale from "very strongly disagree" to "very strongly agree.

Motivation and contemplation to quit assess how motivated someone is to quit e-cigarettes (not all motivated to very motivated)

Prior history of e-cigarette quitting behaviors assesses how many times a participant has tried to quit (yes/no; if yes, how many quit attempts)

Semi-structured interviews will assess preferences for assessment of e-cigarette use within oncology clinic settings and referral for cessation programs.

Questionnaires will assess current processes and barriers to vaping assessments and referral to cessation programs, as well as information needs, preferences, and required tools.

Interviews will assess provider experience, barriers, and facilitators of developed implementation strategies

The Feasibility of Intervention will be administered to healthcare providers to assess the potential utility and modifications needed for the developed implementation strategies. This brief 4-item questionnaire was designed to test implementation outcomes related to program feasibility. This questionnaire is considered a strong indicator of future implementation success and will be used to inform modifications for large scale testing of implementation processes in future research. Items on this assessment are routinely modified to match the specific implementation programming, and for this study were modified slightly to gauge healthcare provider perceptions of vaping assessment and referral processes to This is Quitting

Items were modified from previous research to assess patient-doctor communication surrounding e-cigarette use including interest, comfort, and importance of these discussions. Questions also assessed for discussions related to use, referral for quitting support, and attitudes/beliefs about e-cigarette risk.

The Acceptability of Intervention Measure and Intervention Appropriateness Measures will be administered to evaluate implementation potential of the vaping cessation program. These brief 4-item questionnaires were designed to test implementation outcomes related to program acceptability and appropriateness. They are considered strong indicators of future implementation success and will be used to inform modifications. Items on this assessment are routinely modified to match the specific implementation programming, and for this study were modified slightly to gauge participant perceptions of This is Quitting.

This survey will evaluate patient participant perspectives on satisfaction of TIQ programming including types of messages and frequency of messaging, and the degree the program was helpful in reducing vaping.

The Patient Reported Outcome Measurement Information System (PROMIS) Profile will be administered to assess self-reported physical functioning mobility, anxiety, depressive symptoms, fatigue, peer relationships, pain interference, and pain intensity over a 7-day period. Participants <18 will complete the self-reported pediatric version (49 items), and participants ≥ 18 will complete the adult version (43 items). Items are summed and T-scored, have a mean of 50 and a standard deviation of 10. This assessment will help inform psychological components associated with vaping behaviors and interest in quitting that may support implementation processes

Social support is a known protective factor against substance use, and social media influence can promote substance use. We will implement assessments to explore the association of social influence on vaping behaviors using the Multidimensional Scale of Perceived Social Support (MSPSS). The MSPSS is a 12-item self-report questionnaire that assesses perceived support from friends, family, and a significant other. Questions are answered on 7-point Likert scale from "very strongly disagree" to "very strongly agree." Higher scores are indicative of more social support. Additional items will be administered to assess social media influence on vaping behaviors.

The Investigators will use several brief dietary assessment to explore associations within this study.

Rapid Easting Assessment for Participants is used to quickly assess nutrient intake/diet quality in a clinical and research settings. It is completed for the previous week's food intake and scored by summing responses from 'usually/ often' to 'rarely/never or does not apply to me'. Possible scores ranged from 13 to 39 with a higher score indicating a higher diet quality. There is an additional 3-question section at the end about cooking/shopping and willingness to change eating habits.

The Binge Eating Scale includes 16 multiple choice items assessing the presence of certain binge eating behaviors which may be indicative of an eating disorder. Scores are summed for a maxi

Research has highlighted links between smoking cessation and increased physical activity in the general AYA population, and physical activity may be an important determinant in supporting vaping cessation. Understanding physical activity behaviors may provide additional mechanisms to improve vaping behaviors. As such, we will administer the International Physical Activity Questionnaire (IPAQ) short form is a 7-item self-reported questionnaire that assesses perceived health-related physical activity. Questions are answered based on the amount of reported minutes and/or hours per days participants engage in physical activity. Physical activity level is scored and categorized within three levels of activity: vigorous, moderate, and walking intensity. Scores can be converted to metabolic equivalents.

General demographic data will be gathered about health care providers including provider type (e.g., physician, psychologist, nurse practitioner), gender identity, and years of independent practice.

CES is a 20-item self-report questionnaire that assesses the extent to which the most stressful or impactful traumatic event experienced in participants' lives serves as a pivotal point in the development of their identity or influences their attribution of meaning to other events in their lives. For this questionnaire, participants will specifically answer questions about their cancer experience. Of the 20 items, 8 items assess the extent to which an event has become a reference point for the participant, 6 items assess the extent to which the event is central to participants' identity, and 6 items assess the extent to which participants think the event was a turning point in their life story. Questions are answered on a 5-point Likert scale ranging from " Totally Disagree" to "Totally Agree." No items are reverse coded and higher scores indicate greater centrality of the traumatic event to the participant.