Table 1.

Comparison between Fresh Facts (15 day) and Fresh Facts (30 day)

	Fresh Facts (15 day)			Fresh Facts (30 day)
	High Frequency	Medium Frequency	Low Frequency	High Frequency	Low Frequency
Intervention target(s)	Perceived behavioural control			Perceived behavioural control, attitude, subjective norm
Email frequency	15	10	5	27	9
Total number of intervention messages	15	10	5	27	27
Intervention messages per email	1	1	1	1	3
Email format	Text only	Text only	Text only	HTML and Text	HTML and Text
Images included in emails	No	No	No	Yes	Yes