Table 2.

Outcomes and assessment points

Variables	Measurement	Screening	t0	t1	t2	t3
Inclusion/exclusion criteria
Inclusion/exclusion criteria	SRQ	x
Mindfulness	FMI	x
Primary outcome
Mindfulness	FMI				x
Secondary outcomes
Mindfulness	FMI		x	x		x
Depressive symptoms	PHQ-9		x	x	x	x
Anxiety	GAD-7		x	x	x	x
Stress	PSS-4		x	x	x	x
Well-being	WHO-5		x	x	x	x
Presenteeism	PSS		x		x	x
Interoceptive sensibility	BPQ		x		x	x
Self-efficacy	SES		x	x	x	x
Cognitive fusion	CFQ-D		x	x	x	x
Emotion regulation	ERQ		x	x	x	x
Alexithymia	TAS-20		x	x	x	x
Intervention adherence	Intervention dropout			x	x	x
Intervention satisfaction	CSQ-8				x*
Side effects of intervention	INEP*				x	x
Covariates
Demographic variables	SRQ		x
Previous experience with mindfulness, use of additional treatment options	SRQ		x		x	x
Treatment expectation	CEQ		x

Note. CEQ Client Expectancy Questionnaire, CFQ-D Cognitive Fusion Questionnaire, CSQ-8 Client Satisfaction Questionnaire, German Version ZUF-8, ERQ Emotion Regulation Questionnaire, FMI Freiburg Mindfulness Inventory, GAD-7 Generalized Anxiety Disorder Questionnaire, INEP Inventory for the Assessment of Negative Effects of Psychotherapy, BPQ Body Perception Questionnaire, Awareness Section, PHQ-9 Patient Health Questionnaire, PSS Presenteeism Scale for Students, PSS-4 Short Form Perceived Stress Scale, SES Self-Efficacy Scale, SRQ Self-Report Assessment Questionnaire, TAS-20 Toronto-Alexithymia Scale, WHO-5 World Health Organization Well-Being Index

*Intervention groups only (UG, GoD)