Applying the 4Ps of social marketing to retain and engage participants in longitudinal cohort studies: generation 2 Raine study participant perspectives

Table 4 Pricing insights

Theme	Subtheme	Codes
Theme	Subtheme	*Active participants*	*Non-active participants*
Price	Non-monetary costs	Lab rats (taken on the chin) Time / energy / effort Privacy risk Physical discomfort Psychological or emotional distress Pressure to perform	Lab rats (disgruntled)
Price	Monetary pricing benefits	Free check-ups/ free stuff	N/A

ISSN: 1471-2288