Table 1.

Costs and number of participants recruited by offline recruitment methods.

Method		Characteristics	Participants N	Average costs per participant €
Press releases
	Launch of Snart-Gravid.dk	35 articles/features	506	4.51
	Funding received to continue study	50 articles/features	96	18.35
	Investigating impact of H1N1 influenza	8 articles/features	28	0.00
	Launch of SnartForaeldre.dk	58 articles/features	73	24.28
	Results: physical activity	84 articles/features	23	0.00
	Results: oral contraceptives	81 articles/features	21	0.00
Posters		133 placed in canteens, supermarkets, and so on	47	8.04
Flyers		3500 distributed to GPa offices, pharmacies, and so on	9	67.50
All offline methods			803	9.06

^aGP: general practitioners.