MIND-WELL Intervention

Number of participants enrolled divided by the number of eligible participants approached for participation

Number of enrolled participants who completed the study through the final assessment divided by the number enrolled

Number/proportion of prescribed intervention activities or sessions completed according to the intervention protocol

Number and percentage of scheduled intervention sessions attended by each

Participant satisfaction with the intervention will be assessed using the Client Satisfaction Questionnaire adapted to Internet-based interventions (CSQ-I). Scores from all 8 items are summed to produce a total score ranging from 8 to 32, with higher scores indicating greater satisfaction with the intervention.

Intervention acceptability will be assessed through a semi-structured post-intervention interview exploring participants' experiences with the intervention, including perceived usefulness, satisfaction, and recommendations for improvement.

The Dyadic Coping Inventory (DCI) is a 37-item measure assessing dyadic coping. Items are rated on a 5-point scale from 1 ("very rarely") to 5 ("very often"). The total DCI score is calculated by summing items 1-35 after reverse-coding negatively keyed items. Items 36 and 37 are evaluation items and are not included in the total score. Total scores range from 35 to 175, with higher scores indicating greater dyadic coping.

The Perceived Stress Scale-10 (PSS-10) is a 10-item measure assessing the degree to which situations in one's life are perceived as stressful. Items are summed to produce a total score ranging from 0 to 40, with higher scores indicating greater perceived stress.

The Edmonton Symptom Assessment System-Revised (ESAS-r) assesses symptom severity using an 11-point numeric rating scale ranging from 0 (no symptom) to 10 (worst possible severity). The total symptom distress score is calculated by summing the six physical symptom items, two emotional symptom items, and the well-being item. Total scores range from 0 to 90, with higher scores indicating greater overall symptom distress. The ESAS-r physical symptom score is calculated by summing six physical symptom items, with total scores ranging from 0 to 60. Higher scores indicate greater physical symptom burden. The ESAS-r emotional symptom score is calculated by summing two emotional symptom items, with total scores ranging from 0 to 20. Higher scores indicate greater emotional symptom burden.

Current cigarette smoking status will be assessed using a question from the Behavioral Risk Factor Surveillance System (BRFSS). Participants will report whether they currently smoke cigarettes every day, some days, or not at all.

Current smokeless tobacco use will be assessed using a question from the Behavioral Risk Factor Surveillance System (BRFSS). Participants will report whether they currently use chewing tobacco, snuff, or snus every day, some days, or not at all.

Electronic cigarette or vaping product use will be assessed using a question from the Behavioral Risk Factor Surveillance System (BRFSS). Participants will report whether they have never used electronic cigarettes or other electronic vaping products, currently use them every day, currently use them some days, or used them in the past but do not currently use them.

Among participants who smoke cigarettes, smoking cessation attempts will be assessed using a question from the Behavioral Risk Factor Surveillance System (BRFSS). Participants will report whether, during the past 12 months, they stopped smoking for one day or longer because they were trying to quit smoking.

Alcohol use frequency will be assessed using a question from the Behavioral Risk Factor Surveillance System (BRFSS). Participants will report the number of days during the past 30 days on which they consumed at least one alcoholic beverage. Values range from 0 to 30 days, with higher values indicating more frequent alcohol consumption.

Alcohol consumption will be assessed using a question from the Behavioral Risk Factor Surveillance System (BRFSS). Participants who report alcohol use will report the average number of alcoholic drinks consumed on days when they drank during the past 30 days. Higher values indicate greater average alcohol consumption on drinking days.

Physical activity will be assessed using questions from the Behavioral Risk Factor Surveillance System (BRFSS). Participants will report whether they engaged in physical activity or exercise outside of their regular job during the past month, the type of activity performed most frequently, the frequency of that activity per month, and the typical duration of each activity session.

The Pittsburgh Sleep Quality Index (PSQI) assesses sleep quality and disturbances over the past month. The PSQI generates a global score ranging from 0 to 21, with higher scores indicating poorer sleep quality.

The Mini-Eating Assessment Tool (Mini-EAT) is a 9-item questionnaire assessing diet quality. Item scores are summed to produce a total score ranging from 0 to 100, with higher scores indicating healthier dietary patterns. Scores below 61 indicate an unhealthy diet, scores from 61 to 69 indicate an intermediate diet, and scores above 69 indicate a healthy diet.