Table 1.

Dependent Variables with Sample Items and Answer Formats.

Construct	Item Example and Source	Answer Format	Used in Data Collection
Dependent Variables
Vaccination appointment (adult/child)	“Did you get vaccinated during the last six weeks?” “Did your youngest children get vaccinated during the last six weeks?”	•Yes, the vaccination appointment was carried out as planned. •No vaccination appointment planned. •No, I cancelled it due to the corona situation. •No, the physician cancelled it due to the corona situation. •No, it was cancelled for another reason, … [open text answer].	4/14/20 4/28/20
Catch-up appointment (adult/child)	“Have you already made up a catch-up appointment with your physician?” “Have you already made up a catch-up appointment for your youngest child with your physician?”	•Yes •No •Other	4/28/20
Vaccination appointment and catch-up appointments (adult/child)	“Please think of the last three months. Was a vaccination appointment planned during this period, and did you get the vaccination?” “Please think of the last three months. Was a vaccination appointment planned for your youngest child during this period, and did your child get the vaccination?”	•No vaccination planned during this time. •A vaccination was planned and given on the agreed date. •A vaccination was postponed but already caught up. •A vaccination was postponed, and the catch-up appointment is pending. •A vaccination was postponed. It hasn’t been caught up yet, and no catch-up date has been appointed.	6/9/20
5C psychological antecedents of vaccination (short scale)	Confidence: “I am completely confident that vaccines are safe.” (Betsch et al., 2018)	Likert-scale (1 strongly disagree/ 7 strongly agree)	4/14/20