Table 1.

Process evaluation plan

Process evaluation question	Complete and acceptable delivery	Process measure
How many people of the target population took part in the project? (reach)	The intervention group is comparable to the study population	Weekly recruitment report kept by each research centre
What recruitment procedures were used to attract pregnant women? (recruitment)	Strategies on recruitment across multicentre research.	Notes from (telephone) meetings with research nurses, coaches, principal investigators throughout the project
How many participants received 5 face-to-face conversations with a personal lifestyle coach? (dose delivered)	All (100%) received 5 face-to-face conversations with a personal lifestyle coach	Coach logs recorded after a session
To what extend was face-to-face counselling delivered as planned by MI guidelines? (fidelity)	MI was applied to deliver the face-to-face conversations	Recorded conversations assessed using the Motivational Interviewing Treatment Integrity measure (MITI 3.1.1)
How many telephone booster sessions did the participants receive? (dose delivered)	0–4 telephone booster sessions were delivered	Coach logs recorded after a session
How satisfied were participants with the DALI intervention (components)? (dose received: satisfaction)	All participants were satisfied with the DALI intervention	Evaluation questionnaire at 35–37 weeks of gestation