The BE WITH Project: A Partially Nested Randomized Control Trial (PN-RCT)

The Social Provisions Scale (SPS-5) is a 5-item measure used to evaluate a participant's level of social support. It is a shortened version of the 10-item SPS and designed for use in research studies to reduce participant burden while maintaining strong psychometric properties. The SPS is based on a theory of social support developed by Irwin Weiss and uses one positive item to assess the social provisions of Attachment, Guidance, Social Integration, Reliable alliance, and Reassurance of worth. Each item is rated on a 4-point Likert scale, from "Strongly Disagree" to "Strongly Agree". Sample items include, "There is someone I could talk to about important decisions in my life", "I feel part of a group of people who share my attitudes and beliefs", and "There are people I can count on in an emergency." A total score is calculated by summing the responses to the 5 questions. The scores can range from 5 to 20, with higher scores indicating higher levels of perceived social support.

The three-item UCLA Loneliness Scale (Hughes et al., 2004) is a widely used instrument for measuring subjective feelings of loneliness. The scale assesses three core dimensions of loneliness through corresponding items: relational connectedness ("How often do you feel that you lack companionship?"), social connectedness ("How often do you feel left out?"), and self-perceived isolation ("How often do you feel isolated from others?"). Participants respond using a 3-point scale ranging from "hardly ever" to "often." Total scores range from 3 to 9, with higher scores indicating greater loneliness. The scale demonstrates good psychometric properties in middle-aged and older adult populations.

The GAD-7 is a 7-item questionnaire designed to assess the symptoms of Generalized Anxiety Disorder (GAD). Each item describes a common GAD symptom and is rated on a four-point scale (0-3) based on how often the individual has experienced that symptom over the past 2 weeks. The 7 questions assess feelings such as nervousness, inability to control worrying, trouble relaxing, restlessness, irritability, and feeling afraid. Sample items include, "how often have you felt nervous, anxious, or on edge", "how often have you worried too much about different things", "how often have you had trouble relaxing", and "fFelt afraid as if something awful might happen." Total scores range from 0 to 21, with higher scores indicating increased anxiety severity. Scores are categorized as: 0-4 (minimal anxiety), 5-9 (mild anxiety), 10-14 (moderate anxiety), and 15-21 (severe anxiety).

The Patient Health Questionnaire-9 (PHQ-9) is a 9-item measure to assess depressive symptoms in the past 2 weeks (Kroenke et al., 2001). The scale items correspond to the 9 diagnostic criteria for major depressive disorder. Respondents rate the frequency of each symptom on a 4-point scale ranging from "not at all" to "nearly every day." Sample items include "Little interest or pleasure in doing things" and "Poor appetite or overeating." Total scores range from 0 to 27, with higher scores indicating more severe depressive symptoms. The PHQ-9 includes an additional functional impairment item that assesses how much the problems have affected the respondents' daily activities. The scale has shown strong psychometric properties across diverse populations. Among U.S. older adults, the PHQ-9 showed high sensitivity (88%) and specificity (80%) for identifying major depression, as well as the combination of major and minor depression (Phelan et al., 2010).

The Short Form Health Survey (SF-12) is a self-reported outcome measure to assess health-related quality of life. The raw answers from the 12 questions are processed to produce two main, standardized summary scores: the Physical Component Summary (PCS) and the Mental Component Summary (MCS). We only used the MCS factor in this study as the treatment is targeting mental health. The MCS computed score has a range from 17 to 64 in the analysis and was based on the linear combination of six computed, generated, iterated weights. A low Mental Component Summary (MCS) score indicates poorer self-perceived mental health and lower health-related quality of life.

The Interpersonal Needs Questionnaire (INQ; Van Orden et al., 2012) was used to evaluate thwarted belongingness and perceived burdensomeness through 15 items. We used an adapted version tailored specifically for older adults which includes 3-point Likert scale ranging from 1 (Not at all true for me) to 3 (Very true for me). The instrument includes 2 sets of characteristics: (1) the 9-item Thwarted Belongingness (e.g., "I feel disconnected from other people."); and (2) the 6-item Perceived Burdensomeness (e.g., "I think my death would be a relief to the people in my life."). Six questions from the Thwarted Belongingness subscale were reverse-coded when the overall score across questions was computed due to the nature of those questions. In particular, the total score on the INQ is calculated by summing the questions responses to all items and reversing the appropriate ones. As a result, greater scores on each subscale reflect higher levels of the respective construct being measured.

The 4-item Session Rating Scale is a therapeutic practice measure that treatment recipients complete after receiving treatment. This allows trained helpers to make real-time adjustments to improve treatment effectiveness and prevent dropout. Participants marked their responses on a Likert-Scale, ranging from 0 to 10, representing: (a) the quality of the therapeutic relationship, (b) agreement on goals and topics, (c) the relevance and fit of the treatment provider's approach, and (d) the overall effectiveness of the treatment dosage. The scores for each domain were summed to generate a total possible score of 40. A total score below 36 or a score below 9 on any single item is a potential indicator of concern, which should prompt the therapist to discuss the issue openly with the client and make necessary adjustments to the session's direction or approach.