Outcome
Type |
Measure |
Description |
Time frame |
Safety issue |
Primary |
Change in sleep quality from baseline to post-intervention on the Pittsburgh Sleep Quality Index (PSQI) |
The PSQI includes 19 items, yielding seven dimensions of sleep: duration, disturbance, latency, daytime dysfunction, efficiency, quality, and sleeping medication use. Following standard procedure, we will obtain the PSQI global score by summing across all seven components. Each component has a maximum score of three points; the highest possible global score is 21. Higher PSQI global scores indicate poorer quality, with scores above 5 suggesting clinically-significant sleep disturbance. Our main analyses of the primary outcome will focus on the PSQI global score at post-intervention. Follow-up, exploratory analyses will examine whether observed effects are unique to any of the seven separate subscales of the PSQI, and whether there are intervention effects at the 3, 6, and 12-month post-intervention follow-ups. |
Baseline and post-intervention; 3, 6, and 12-month follow-up |
|
Secondary |
Change in insomnia severity from baseline to post-intervention on the Insomnia Severity Index (ISI) |
The ISI consists of 7 items which are summed for a total score (range: 0-28) with higher scores indicating greater insomnia severity. Scores of 8-14 indicate subthreshold insomnia, while scores of 15-28 indicate clinical insomnia. |
Baseline and post-intervention; 3, 6, and 12-month follow-up |
|
Secondary |
Change in actigraphy-based objective sleep measures from baseline to post-intervention. |
We will obtain objective estimates of sleep using wrist actigraphy. At the baseline assessment prior to randomization (T1) and at T2 and T3, participants will be provided with a wrist actigraph (Micro Motionlogger Sleep Watch, Ambulatory Monitoring, Inc.; Ardsley, NY) to wear on their non-dominant hand for seven consecutive 24-hour periods. The software package Action 4 (Ambulatory Monitoring, Inc.; Ardsley, NY) will be used to code and score the actigraphy data, and established algorithms will be used to provide estimates of parameters such as sleep duration, sleep onset latency, efficiency, daily variability, and wakenings after sleep onset. |
Baseline and post-intervention; 3-month follow-up |
|
Secondary |
Change in depressive symptoms from baseline to post-intervention on the Center for Epidemiological Studies Depression Scale (CES-D) |
The 20-item CES-D is a measure of depression symptom severity, with higher scores (range: 0-60) indicating greater depressive symptoms |
Baseline and post-intervention; 3, 6, and 12-month follow-up |
|
Secondary |
Change in anxiety from baseline to post-intervention on the Generalized Anxiety Disorder- 7 (GAD-7). |
Symptoms of anxiety will be measured via the 7-item GAD-7. Higher scores (range: 0-21) indicate greater severity of symptoms |
Baseline and post-intervention; 3, 6, and 12-month follow-up |
|
Secondary |
Change in perceived stress from baseline to post-intervention on the Perceived Stress Scale (PSS). |
Perceived stress will be measured via the 10-item PSS (range: 0-40). Higher scores indicate greater perceived stress levels. |
Baseline and post-intervention; 3, 6, and 12-month follow-up |
|
Secondary |
Change in loneliness from baseline to post-intervention on the UCLA Loneliness Scale |
Loneliness will be measured via the 3-item UCLA Loneliness Scale (range: 3-9). Higher scores indicate greater loneliness |
Baseline and post-intervention; 3, 6, and 12-month follow-up |
|
Secondary |
Change in fatigue from baseline to post-intervention on the Multidimensional Fatigue Symptom Inventory-Short Form (MFSI-SF) general fatigue subscale. |
Fatigue will be measured via the MFSI-SF general fatigue subscale. This subscale consists of 6 items which are scored for a total sum (range: 0-24). Higher scores indicate greater general fatigue. |
Baseline and post-intervention; 3, 6, and 12-month follow-up |
|
Secondary |
Change in positive affect from baseline to post-intervention on the Positive and Negative Affect Schedule (PANAS-X) |
Positive affect will be assessed using the following subscales on the PANAS-X: the 10-item positive affect subscale, the 3-item serenity subscale and the 8-item joviality subscale. Higher scores indicate higher feelings of positive affect (range: 21-105). |
Baseline and post-intervention; 3, 6, and 12-month follow-up |
|
Secondary |
Changes in psychological well-being from baseline to post-intervention on the Mental Health Continuum-Short Form (MHC-SF) |
The 14-item MHC-SF is comprised of three empirically derived subscales: the 3-item Emotional Well-Being Subscale, the 6-item Psychological Well-Being Subscale, and the 5-item Social Well-Being Subscale. Higher scores on each subscale, and the total score overall (range: 0-56), indicate greater well-being. |
Baseline and post-intervention; 3, 6, and 12-month follow-up |
|
Secondary |
Changes in inflammation from baseline to post-intervention |
Pro- inflammatory gene expression will be measured through a set of 19 pre-specified pro-inflammatory gene transcripts that have previously been shown to be upregulated in the context of chronic stress and downregulated by the mindfulness meditation intervention. In addition, protein markers of inflammation will be assessed, including IL-6, IL-8, IL-10, TNF-a, IFN-?, and CRP. |
Baseline, at 8 weeks and at 20 weeks |
|
Secondary |
Change in worry about sleep from baseline to post-intervention on the Anxiety and Preoccupation with Sleep Questionnaire (APSQ) |
The APSQ has 10 items that can be summed for a total score (range: 10-100). There are also 2 subscales: 6-items determine worries about the consequences of poor sleep and 4-items assess worries about the uncontrollability with sleep, each of which can be summed for a subscale total score. Higher scores indicate greater anxiety and preoccupation about sleep difficulties. |
Baseline and post-intervention; 3, 6, and 12-month follow-up |
|
Secondary |
Change in mindfulness from baseline to post-intervention on the 15-item Five Facet Mindfulness Questionnaire (FFMQ-15) |
The FFMQ-15 is comprised of 5 facets: observing, describing, acting with awareness, non-judgment and non-reactivity, along with an overall mindfulness score. The total FFMQ can be divided by 15 to get an average item score. Scores represent a spectrum of mindfulness. |
Baseline and post-intervention; 3, 6, and 12-month follow-up |
|
Secondary |
Change in self-kindness from baseline to post-intervention on the Self-Compassion Scale. |
Self-kindness will be measured via the 5-item self-kindness subscale from the Self-Compassion Scale. A self-kindness score is computed by calculating the mean of the 5-items. Higher scores indicate greater self-kindness. |
Baseline and post-intervention; 3, 6, and 12-month follow-up |
|
Secondary |
Change in rumination from baseline to post-intervention on the Rumination and Reflection Questionnaire (RRQ) |
Rumination will be measured via the 6-item rumination subscale from the Rumination and Reflection Questionnaire. Higher scores indicate more rumination. |
Baseline and post-intervention; 3, 6, and 12-month follow-up |
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