The HEART Study (Healthy Eating and Recovery Together)

System Usability Scale (SUS) - The SUS consists of a 10 item questionnaire with five response options for respondents; from Strongly agree to Strongly disagree. Scores range from 0-100, with higher scores indicating better usability.

30-item Cancer Survivors/Partners Unmet Needs instruments (CaSUN/ CaSPUN). Needs were endorsed on a yes/no basis, with a range of 0-30 total endorsed needs. A higher score indicates more endorsed needs. Average number of needs is reported.

PROMIS Depression- SF v1.0 form 8A is an 8-item Patient-Reported Outcomes Measure Information System (PROMIS) short-form instrument. Respondents are asked how often in the past 7 days they have experienced specific depression symptoms, using a 5-point ordinal rating scale of "Never," "Rarely," "Sometimes," "Often," and "Always" whereby a higher score indicates higher depression. Raw score totals are converted to an item response theory-based T-scores. The T-score rescales the raw score into a standardized score with a mean of 50 and a standard deviation (SD) of 10 with a range of 38.2 to 81.3. Therefore, a person with a T-score of 40 is one SD below the mean. A decrease in change from baseline to 6 week followup indicates reduced depression.

The 11-item Preparing for Life As a New Survivor (PLANS) Knowledge Subscale, developed at the University of Michigan, is utilized to evaluate survivor and caregiver (1) knowledge of diagnosis, treatment and side effects, and (2) communication with the cancer team regarding diagnosis, treatment and side effects and 3) preparedness for what to expect over the next year. Items are rated on a 6-point scale where: strongly disagree=1, moderately disagree =2, slightly disagree=3, slightly agree= 4, moderately agree=5 and strongly agree=6. Items were averaged, with a range of 1-6 with higher scores indicating higher levels of agreement.

Based on the National Cancer Institute Follow-up Care Use Among Survivors (FOCUS) survey, two questions were asked: "How confident are you that you can get advice or information related to your/your loved one's cancer if you needed at this time?" and "How confident are you that you can (assist your loved one to) keep to the follow-up care schedule recommended by your doctors?" Participants rated items on a 5-point Likert scale where 0="Not at all confident" to 4= "Completely confident." Scores were averaged for each question, whereby higher scores indicated higher level of confidence. Change from baseline to 6 week follow up is also reported. Negative change indicates decline in self-efficacy.

Dyadic Coping was measured using a 5-item cancer-specific subscale version of the Dyadic Coping Inventory. Items are rated on a 5-point scale from 1 ("never") to 5 ("always"). Scores were averaged with a higher score indicating a better outcome. A decrease in change between baseline and 6 week followup visit indicates worsening outcome over time.

Dyadic Efficacy is an investigator developed 1-item question "How confident are you that you and your loved one can work together as a team to manage the cancer-related problems that come up?" Item was answered on a scale of 0 ("not at all confident") to 10 ("extremely confident"), with average score reported. A decrease in change between baseline and 6 week followup visit indicates worsening, where as an increase in change indicates improvement.

PROMIS Scale v1.2 - Global Health short form consists of 10 items that assess overall perceived quality of life and five general domains of health and functioning including overall physical health, mental health, social health, pain, and fatigue. Scoring uses a 5-point Likert scale with the response scores reversed (5=None to 1=Very severe) so that higher scores for responses always indicate better health. Raw scores are summed and converted to a T-score (mean score of 50, SD ± 10), Therefore a person with a T-score of 40 is one SD below the mean. A decrease in the change from baseline to 6 week follow up indicates worsening quality of life, whereas an increase indicates improvement.

4-item screening version of the Zarit Burden Interview is a self-report measure of caregiver burden. Caregivers rate each item on a 5-point Likert scale (0=never, 4= nearly always). Higher scores indicate greater caregiver distress. Total score range: 0 to 16, ≥ 8: high burden. An increase in change from baseline to 6 week follow up visit indicates increased caregiver distress.

Number of weekly prompt responses missed out of 184 total expected (23 caregivers given 2 prompts per week for 4 weeks).

Number of participants of use of care plan after session, including patient and caregiver report of "Referred to Care Plan again," "Used Care Plan," "Used educational materials," and "Shared Care Plan with others."

Ratings of satisfaction with app and prompts on a 6 point descriptive rating scale ranging from strongly agree to strongly disagree. Measurements reported below are count of participants who moderately or strongly agreed with individual prompts.

Resources needed: Session length overall, length of nursing portion of session, length of app training- number of minutes

Investigator-developed 1 item: "During the past two weeks, how satisfied have you been with your nutritional status (from Extremely satisfied (1) to Not at all satisfied (5))?"

Adapted Symptom Distress Scale 1 item scaled to assess how distressing symptoms are to participant. 0= not at all distressing, 10= extremely distressing

1 item to assess patient and caregiver perceptions concerning patient ability to manage symptoms. 0= can manage extremely well, 10= cannot manage at all

PROMIS Short Form v2.0 - Emotional Support - 4a is a 4-item questionnaire. Item banks (currently adults only) assess perceived feelings of being cared for and valued as a person; having confidant relationships. PROMIS instruments are scored using item-level calibrations. Each question usually has five response options ranging in value from one to five. Raw scores are the sum of values of the response to each question then rescaled to to a standardized T-score with a mean of 50 and a standard deviation (SD) of 10. Therefore a person with a T-score of 40 is one SD below the mean.

MD Anderson Symptom Inventory (MDASI) Head and Neck Module- Includes 13 core items and an additional 9 head and neck cancer module items which calculates a total score of symptom severity. The MDASI assesses the severity of symptoms at their worst in the last 24 hours on a 0-10 Numeric Rating Scale, with 0 being "not present" and 10 being "as bad as you can imagine." Core items and module symptom items are averaged into a mean module severity. A higher score always indicates an increase in severity. A decrease in change from baseline to 6 week follow up indicates improvement of symptoms.