Gu 2017.

Methods	Randomised controlled trial
Participants	Country: China Setting: ambulatory Age: undergraduate students between the ages of 19 and 24 Sample size: 54 Sex: 24 women, 30 men Inclusion criteria: meeting DSM‐5 criteria for ADHD in adulthood Exclusion criteria: major depressive episode, bipolar disorder, substance abuse/dependence within the last 6 months; actively suicidal ideation; history of psychotic disorder, and learning difficulties or other cognitive impairments
Interventions	Intervention: mindfulness‐based cognitive therapy (8 weekly 2.5‐h sessions) (n = 28; 20 participants with pharmacotherapy and 8 without pharmacotherapy) Control: waiting list group (n = 26; 20 participants with pharmacotherapy and 6 without pharmacotherapy) Dosage, timing of dosage and administration of pharmacotherapy were not specified.
Outcomes	Primary outcomes ADHD symptoms ‐ Conners' Adult ADHD Self‐Rating Scale (CAARS‐S) Anxiety ‐ Beck Anxiety Inventory (BAI) Depression ‐ Beck Depression Inventory–2nd edition (BDI‐2)
Notes	We contacted authors to get more information, but they had not responded at the time of writing. Study start date: not specified Study end date: not specified Funding source: the author(s) received no financial support for the research, authorship or publication of this article. Declarations of interest: the author(s) declared no potential conflicts of interest with respect to the research, authorship or publication of this article.
Risk of bias
Bias	Authors' judgement	Support for judgement
Random sequence generation (selection bias)	Unclear risk	Comment: not described
Allocation concealment (selection bias)	Unclear risk	Comment: not described
Blinding of participants and personnel (performance bias) All outcomes	High risk	Comment: it is not possible to blind personnel in a psychosocial intervention.
Blinding of outcome assessment (detection bias) All outcomes	Low risk	Comment: participants were assessed by an interviewer who was blind to participant condition.
Incomplete outcome data (attrition bias) All outcomes	Low risk	Quote: "The intent‐to‐treat sample consisted of 30 and 26 participants from the MBCT treatment group and [waiting list] control group, respectively. Two participants dropped out of [mindfulness‐based cognitive therapy] after six sessions and did not complete the post‐treatment or follow‐up assessments; all other participants completed treatment and the three study assessments."
Selective reporting (reporting bias)	Low risk	Comment: the study protocol is not available but it is clear that the published reports include all expected outcomes, including those that were prespecified.
Other bias	Low risk	Quote: "The majority of the sample was Chinese students who were recruited through general psychology courses."
Conflict of interest	Low risk	Comment: the author(s) declared no potential conflicts of interest with respect to the research, authorship or publication of this article.