Table 1.

Study eligibility criteria.

	Inclusion Criteria	Exclusion Criteria
Participants	Patients with psychiatric disorders according to either a formal diagnosis interview and/or a cut-off for clinical symptoms in a rating scale; No restrictions were placed on age.	Patients with other disorders, and only healthy subjects.
Interventions	Mindfulness-based interventions (MBIs)	Other non-pharmacological interventions.
Outcome	At least one biomarker.	No biomarkers.
Study design	RCTs, Non-RCTs, Open trials with a pre-post analysis.	Study protocols, cross-sectional studies, qualitative studies
Publications	Published as full-text articles in peer-reviewed scientific journals.	Published as reviews, case reports, conference abstracts, or letters.

Abbreviations: Non-RCTs, non-randomised controlled trials; RCTs, randomised controlled trials.