Table 1.

Study eligibility criteria.

	Inclusion criteria	Exclusion criteria
Participants	Healthy adult subjects (aged ≥18 years).	Patients with some kind of diseases, pregnancy, and obesity.
	No restrictions regarding the number of participants.
Interventions	Mindfulness-based interventions (MBIs).	Other non-pharmacological interventions.
	With a minimum duration of 6 weeks.
Outcome	At least salivary cortisol outcomes in normal conditions (without a stress test).	Only other biomarkers, or only stress test assessments.
Study design	RCTs.	Non-RCTs, open trials with a pre-post analysis.
Publications	Published in English, French, or Spanish and as full-text articles in peer-reviewed scientific journals from January 1980 to May 2015.	Published in other languages and as reviews, case reports or letters.

Non-RCTs, non-randomized controlled trials; RCTs, randomized controlled trials.