Data collection wave	Screening and recruitment hours per completion		Hours per completion
Data collection wave	(SRHPC)		(HPC)
	Cell phone	Landline	Cell phone	Landline
2010	2.0	0.77	2.3	1.2
(N = 27)	2.0	0.77	2.3	1.2
2013	1.1	0.68	1.4	0.91
(N = 32)	1.1	0.68	1.4	0.91
2015	1.0	1.0	1.3	1.3
(N = 35)	1.0	1.0	1.3	1.3