Table 1.

Overview of participant characteristics at data collection stages 2, 3, 4, 7, and 8.

Participants			Semistructured interviews (stage 2; n=15)		Co-design workshop 1 (stage 3; n=10)		Co-design workshop 2 (stage 4; n=10)		Paper prototypes (stage 7; n=11)		Proof of concept (stage 8; n=6)
User type, n (%)
	Academic	5 (33)		1 (10)		3 (30)		2 (18)		N/Aa
	Digital	5 (33)		5 (50)		4 (40)		6 (55)		6 (100)
	Public health	5 (33)		4 (40)		3 (30)		3 (27)		N/A
Organizations			Be Mindful Fresh Egg Lancashire County Council Mindtech NHSE/Ib PHEc SH:24 The University of Edinburgh UCLd WHOe		Mindwave PHE SH:24 UCL		DHSCf King’s College London NICEg PHE Unboxed WHO		DHSC PHE		PHE

^aN/A: not applicable.

^bNHS E/I: National Health Service England and Improvement.

^cPHE: Public Health England.

^dUCL: University College London.

^eWHO: World Health Organization.

^fDHSC: Department of Health and Social Care.

^gNICE: National Institute of Health and Care Excellence.