Brief Telehealth CBT-I Intervention in the Context of the COVID-19 Pandemic

Whether the participant has an insomnia clinical diagnosis will be measured by the DUKE. The DUKE is a structured interview which screens for sleep disorders in accordance with criteria of both the DSM-IV and the international classification of sleep disorders (ICSD-2). The DUKE is composed of 4 modules that assess sleep disorder symptoms associated with complaints of insomnia, sleep disorders associated with complaints of hypersomnia, circadian rhythm sleep disorders, and sleep disorders associated with parasomnias.

The PHQ-9 is a self-administered 9-item 0 to 3 scale (0 = not at all, 3 = nearly every day) questionnaire that assess each of the 9 DSM-IV depression criteria. The total score ranges from 1 - 27 which measures the severity of the reported depression with consideration for both Major Depressive Disorder and other depressive disorders based on the number of items that were rated a 2 to 3.

The GAD-7 is a widely used diagnostic self- report scale that screens, diagnoses, and assess severity of anxiety disorder. The GAD-7 is a 7-item 0 to 3 (0 = Not at all, 3 = Nearly every day) scale that measures the degree of severity of anxiety over the last 2 weeks with a total score ranging from 0 to 21, with a higher score indicating a more severe anxiety.

Subjective ratings of sleep disturbance and insomnia severity will be assessed with the Insomnia Severity Index. The Insomnia Severity Index (ISI) is a 7-item self-report measure of insomnia type, severity, and impact on functioning. The items consist of severity of sleep onset, sleep maintenance, early morning awakenings, sleep dissatisfaction, interference with daytime functioning, noticeability of sleep problems by others, and distress caused by sleep difficulties. Items are scored from 0 to 4 (0 = no problem, 4 = very severe problem). Score ranges of insomnia are: 0-7 absent, 8-14 sub-threshold, 15-21 moderate, and 22-28 severe. The ISI has good validity and reliability.

The SF-36 is a 36-item self-administered survey to assess comprehensive quality-of-life measures. It consists of eight sections: vitality, physical functioning, bodily pain, general health perceptions, physical role functioning, emotional role functioning, and mental health. This survey is widely used and has been proven to be a reliable indicator of quality-of-life measures. The global score range is 0-100, with higher scores indicating better health conditions.

Suicidality ideation and behaviors will be measured by the S-STS. The S-STS is a 16-item 0 to 4 scale (0 = no problem, 4 = very severe problem) that assesses the risk of suicidality. For this outcome measure, 15 items (excluding #13) are summed for an overall score range of 0 to 45 (higher scores indicate more severe problems).

Loneliness risk factors will be assessed with the UCLA Loneliness Scale that measures a participant's subjective feelings of loneliness and social isolation. The UCLA Loneliness Scale has 20 items, each on a 1 to 4 scale (1 = Never, 4 = Often), summed for an overall range of 20 to 80 with higher scores indicating greater degrees of loneliness.

The Social Network Index is a 12-item questionnaire that assess participation in different types of social relationships. The 12 types of relationships (e.g. friend, children, spouse, religious group member) are scored by the number network members they communicate with at least every 2 weeks.

The Perceived Stress Scale is a widely used self-reported questionnaire that assesses how stressful participants believe their live is. Items are generalized and measure the degree participants judge their lives to be uncontrollable and unpredictable over the course of the previous month.

Self-report questions regarding screen time will be included in the Coronavirus Health Impact Survey. Questions measure the amount of time spent per day, over the course of the two most recent weeks, using an electronic device.

The International Physical Activity Questionnaire assess an individual's physical activity across 5 life domains over the last 7 days. The activity domains consist of physical activity related to work, transportation, housework and caring for family, and recreation and sports as well as the amount of time spent sitting. The IPAQ has high reliability and validity and has been widely used to measure comparable estimates of physical activity in large populations.

Sleep Onset Latency (SOL) is the time (minutes) from "lights out" to actually falling asleep (sleep onset) based on sleep logs.

Number of Awakenings is determined by number of times of awakening as reported on sleep logs.

Wake After Sleep Onset (WASO) are periods of wakefulness occurring after sleep onset, before final awakening (sleep offset).

Total Sleep Time (TST) is the total time spent asleep, from the start of sleep onset to sleep offset subtracting any periods of wakefulness.

Sleep Efficiency (SE) is calculated as TST divided by total time spent in bed, multiplied by 100.

This measure is of the Beck Depression Inventory-II total score after excluding one sleep item. The average item score for the remaining 20 items will be multiplied by 21 (the original number of items), to create a modified depression scale that maintains the original range (ranges: 0-13 minimal, 14-19 mild, 20-28 moderate, and 29-63 severe).

The BDI-II is a 21-item self-report scale with high validity and reliability that assesses the severity of depression symptoms. The depression items consist of: sadness, pessimism, past failure, loss of pleasure, guilty feelings, punishment feelings, self-dislike, self-criticalness, suicidal thoughts or wishes, crying, agitation, loss of interest, indecisiveness, worthlessness, loss of energy, changes in sleeping pattern, irritability, changes in appetite, concentration difficulty, tiredness or fatigue, and loss of interest in sex. Items are scored from 0 to 3, and higher scores indicate greater levels of severity.

Clinical anxiety symptoms will be measured by the BAI. The BAI is a 21-item self-report scale that assesses the severity of anxiety symptoms. Items are scored from 0 to 3 (0 = not at all, 3 = severe). Higher scores indicate greater levels of severity, and the ranges for anxiety levels are: 0-9 normal to minimal, 10-18 mild to moderate, 19-29 moderate to severe, and 30-63 severe. The BAI consists of two factors: somatic and cognitive.