TABLE 1.

Participation of children in sample by year

	2018	2019 a	2020 b
Participants invited	240	168	157
Provided valid data	182	127	74
No response	10	7	63
Opted out	7	6	14
No data	2	2	0
Moved away	39	26	6

Note: Please see Table S1 for a detailed breakdown of the number of children who provided valid data across time points.

^a Sample was refreshed n = 50.

^b Only children with valid data in 2018 and/or 2019 were invited.