Table 2.

Compliance rates by group (treatment or control).

Treatment	Compliance rate, total n (%); 95% CI		Subject-line length (words)	Message-opening rate, total n (%); 95% CI
	Screenings	Lab tests
Control	5075 (14.1); 13.1%-15.1%	9581 (23.6); 22.7%-24.4%	8	20,959 (63.4); 62.7%-64.1%
Gains	4416 (13.9); 12.9%-15.0%	8687 (23.3); 22.4%-24.2%	15	20,393 (58.6); 57.9%-59.2%
Losses	3122 (12.9); 11.8%-14.1%	6027 (23.5); 22.4%-24.6%	14	15,165 (55.3); 54.5%-56.1%
Recommendation	4890 (13.1); 12.1%-14.1%	9357 (24); 23.2%-24.9%	11	20,584 (63.2); 62.6%-63.9%
Implementation intentions	4854 (14.1); 13.2%-15.2%	9015 (23.4); 22.6%-24.3%	16	20,701 (61.1); 60.5%-61.8%
Empowerment	3153 (14.1); 13.0%-15.4%	6133 (23.8); 22.7%-24.9%	14	15,246 (55.7); 54.9%-56.5%