Table 2.

Measurements and time points

	Concept	Questionnaire	Measurement time points
			12 weeks		16 weeks		20 weeks		28 weeks		36 weeks		Childbirth
			I	C	I	C	I	C	I	C	I	C	I	C
Primary	Pregnancy distress	EDS	X	X			X	X	X	X	X
	Pregnancy distress	TPDS (NA)	X	X			X	X	X	X	X
Secondary	Mindfulness skills	TFMQ-SF			X				X		X
	Rumination	RRQ			X				X		X
	Self-compassion	SCS-SF			X				X		X
Tertiary	Obstetric data	Non-standardized											X	X
	Demographic data	Non-standardized	X	X
	Evaluation intervention	Non-standardized							X		X

Note: 12 weeks, baseline; 16 weeks, before intervention; 20 weeks, halfway through the intervention; 28 weeks, post intervention; 36 weeks, after 8 weeks follow-up; I, intervention group; C, control group; EDS, Edinburgh Depression Scale; TPDS, Tilburg Pregnancy Distress Scale; NA, negative affect; TFMQ-SF, Three Facet Mindfulness Questionnaire Short Form; RRQ, Rumination Reflection Questionnaire; SCS-SF, Self-Compassion Scale Short Form; MBI, mindfulness-based intervention