Eligibility status	Targus		Cell-WINS
	Active/inactive	Unknown	Active	Inactive
Single wave
Number of completed surveys	428	16	433	11
Productivity compared to totals	1.1	0.28	1.2	0.13
Productivity of excluded to included	0.25	0.10
High effort
Number of completed surveys	765	29	774	20
Productivity compared to totals	1.1	0.33	1.1	0.19
Productivity of excluded to included		0.31		0.16