Outcome
Type |
Measure |
Description |
Time frame |
Safety issue |
Other |
Depressive symptoms |
Measured with the Quick Inventory of Depressive Symptomatology Self-Report (QIDS-SR). The QIDS-SR consists of 16 items. Scores range from 0-27. Higher scores indicate a higher severity of depression. |
Week-to-week change assessed after each MBCT session (up to 8 weeks) or weekly during wait-list (up to 8 weeks) |
|
Other |
Non-judging mindfulness skill |
Measured with the non-judging subscale of the FFMQ. This subscale consists of 8 items. Negatively-phrased items will be reversed-scored before calculation of either (i) a sumscore of all items (range 8-40), or the mean of the subscale (range 1-5). A higher score indicates a better/higher capability of the non-judging domain of mindfulness. |
Week-to-week change assessed after each MBCT session (up to 8 weeks) or weekly during wait-list (up to 8 weeks) |
|
Other |
Depressive rumination |
Measured with the brooding subscale of the Ruminative Response Scale (RRS). The brooding subscale consists of 5 items. Scores range from 5-20. Higher scores indicate a higher level of depressive rumination. |
Week-to-week change assessed after each MBCT session (up to 8 weeks) or weekly during wait-list (up to 8 weeks) |
|
Primary |
Depressive symptoms |
Measured with the Inventory of Depressive Symptomatology Self-Report (IDS-SR). The IDS-SR consists of 30 items. Scores range from 0-84. Higher scores indicate a higher severity of depression. |
Change from baseline to mid-treatment (4 weeks), to post-treatment (8 weeks) |
|
Primary |
Depressive rumination |
Measured with the brooding subscale of the Ruminative Response Scale (RRS). The brooding subscale consists of 5 items. Scores range from 5-20. Higher scores indicate a higher level of depressive rumination. |
Change from baseline to mid-treatment (4 weeks), to post-treatment (8 weeks) |
|
Primary |
Repetitive negative thinking (RNT) |
Measured by the Perseverative Thinking Questionnaire (PTQ). The PTQ consists of 15 items. Scores range from 0-60. Higher scores indicate a higher level of repetitive negative thinking. |
Change from baseline to mid-treatment (4 weeks), to post-treatment (8 weeks) |
|
Secondary |
Intrusive thoughts (state measure) |
Measured with the breathing focus task (BFT) that measures negative, positive and neutral thoughts during task performance |
Change from baseline to mid-treatment (4 weeks), to post-treatment (8 weeks) |
|
Secondary |
Mindfulness Skills |
Measured with the Five Facet Mindfulness Questionnaire - Short Form (FFMQ-SF). This questionnaire is divided into the subscales observing (4 items), and describing, acting with awareness, non-judging and non-reactivity (all 5 items). The facets scores will be calculated by determining the mean of corresponding item scores. Negatively-phrased items will be reversed scored before computing the mean scores of the subscales. Subscale scores range from 1-5, with higher scores indicating 'higher/better' ability of mindfulness on the corresponding domain. |
Change from baseline to mid-treatment (4 weeks), to post-treatment (8 weeks) |
|
Secondary |
Anxiety Symptoms |
Measured with the Spielberger State-Trait Anxiety Inventory (STAI). The STAI consists of 20 items. Scores range from 20-80. Higher scores indicate a higher severity of anxiety. |
Change from baseline to mid-treatment (4 weeks), to post-treatment (8 weeks) |
|
Secondary |
Overall functioning |
Measured with the Outcome Questionnaire - 45 (OQ-45). The OQ-45 consists of 45 items. Scores range from 0-180. Higher scores indicate higher symptom severity. |
Change from baseline to mid-treatment (4 weeks), to post-treatment (8 weeks) |
|
Secondary |
Self-compassion |
Measured with the Self Compassion Scale - Short form (SCS-SF). The scale consists of six subscales each containing 2 items: self-kindness, self-judgment, common humanity, isolation, mindfulness and over-identification. The negatively phrased items will be reversed-scored before calculating subscale and total scores. Each subscale ranges from 2-14. A higher score indicates a higher level (better outcome) of self-kindness, common humanity, mindfulness, self-judgment, isolation, and over-identification. Total scores range from 12 to 84 (summed subscale scores), a higher score indicates a higher level of self-compassion. |
Change from baseline to mid-treatment (4 weeks), to post-treatment (8 weeks) |
|
Secondary |
Influence of Pavlovian information on goal-directed behaviour |
Measured with the Pavlovian to Instrumental Transfer (PIT) task |
Change from baseline to mid-treatment (4 weeks), to post-treatment (8 weeks) |
|
Secondary |
Working memory - emotion-dependent update and ignore capacity of working memory |
Measured with the Working Memory Update/Ignore Emotion Task (WMUIET) |
Change from baseline to mid-treatment (4 weeks), to post-treatment (8 weeks) |
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