Logit coefficients	Odds ratios
Pre-notification	0.05	1.06
Invitation by e-mail	-0.45	0.64
Pre-notification × invitation by e-mail	0.71**	2.02**
Days since ALLBUS interview	0.00	1.00
Trust	0.15	1.16
Age	0.03**	1.03**
Education
Middle	0.11	1.11
High	0.68**	1.97**
Male	0.08	1.08
Constant	-0.31
McFadden’s pseudo-R2	0.05
Number of observationsa	606