Table 5.

Engagement with various emails through the study

Email & Treatment	n	% Opened	Times opened (mean)	Time to open (h) median (IQR)
Welcome
	5475	82.36	2.78	8.50	(2.88–20.33)
Report 1
	4168	84.88	2.13	7.37	(2.53–19.22)
Report 2
	4132	81.03	1.87	6.66	(2.59–18.37)
Report 3
	4105	78.59	1.83	6.19	(2.51–17.85)
Report 4
Control	1247	79.23	1.62	5.40	(2.30–14.65)
Info	1262	83.68	1.99	5.40	(2.40–16.83)
Pricing	1222	82.90	2.64	6.06	(2.35–17.57)
Halfway
Control	1250	76.80	1.60	5.60	(2.41–15.54)
Info	1263	83.29	1.72	5.50	(2.53–17.35)
Pricing	1222	80.93	2.17	5.51	(2.24–17.15)
Report 5
Control	1243	76.43	1.55	5.96	(2.42–15.37)
Info	1255	80.80	1.90	6.28	(2.42–17.29)
Pricing	1213	80.54	2.24	6.94	(2.66–19.82)
Report 6
Control	1238	77.06	1.87	5.78	(2.35–16.89)
Info	1252	78.12	1.87	5.87	(2.57–17.32)
Pricing	1208	79.22	2.09	6.24	(2.41–17.87)
Report 7
Control	1235	74.98	1.61	5.83	(2.35–15.83)
Info	1248	77.64	1.66	6.08	(2.44–18.16)
Pricing	1205	80.25	2.02	6.07	(2.33–17.49)
Report 8
Control	1231	79.69	1.50	6.11	(2.55–17.01)
Info	1246	78.33	1.46	6.41	(2.49–18.85)
Pricing	1200	81.50	2.01	6.55	(2.49–18.80)