Table 3.

Coach feedback and coach–participant messages at 12 months summarized using mean (SD)

Coach–participant interactions	All participants* n=1355	Highly engaged† n=640	Minimally engaged‡ n=715	P value	WL <5%	WL 5% to <7%	WL 7% to <10%	WL ≥10%	P value
n	1355 (100%)	640 (47%)	715 (53%)		771 (57%)	161 (12%)	163 (12%)	260 (19%)
Number of food log feedback/week	1.1 (0.8)	1.4 (0.9)	0.9 (0.7)	<0.001	1.1 (0.8)	1.2 (0.9)	1.4 (0.9)	1.2 (0.8)	<0.001
Number of food log feedback days/week	0.6 (0.4)	0.8 (0.4)	0.5 (0.3)	<0.001	0.6 (0.4)	0.7 (0.4)	0.8 (0.4)	0.7 (0.3)	<0.001
Number of exercise feedback/week	0.4 (0.3)	0.4 (0.3)	0.3 (0.3)	<0.001	0.3 (0.3)	0.4 (0.3)	0.4 (0.3)	0.4 (0.3)	<0.001
Number of exercise feedback days/week	0.3 (0.2)	0.3 (0.2)	0.2 (0.2)	<0.001	0.3 (0.2)	0.3 (0.2)	0.3 (0.2)	0.3 (0.2)	0.001
Number of coach message/week	2.5 (1.4)	3.0 (1.4)	2.1 (1.2)	<0.001	2.4 (1.3)	2.8 (1.3)	3.0 (1.4)	2.8 (1.5)	0.013
Number of coach message days/week	1.4 (0.6)	1.6 (0.5)	1.3 (0.6)	<0.001	1.4 (0.6)	1.6 (0.5)	1.6 (0.5)	1.5 (0.5)	<0.001
Number of participant messages/week	1.4 (1.3)	1.8 (1.6)	1.1 (0.8)	<0.001	1.3 (1.3)	1.5 (1.0)	1.8 (1.4)	1.6 (1.6)	<0.001
Number of participant message days/week	0.9 (0.6)	1.1 (0.7)	0.7 (0.5)	<0.001	0.9 (0.6)	1.0 (0.53)	1.1 (0.6)	1.0 (0.7)	<0.001
Number of participant community messages/week	0.1 (0.1)	0.1 (0.1)	0.0 (0.1)	<0.001	0.1 (0.1)	0.1 (0.1)	0.1 (0.2)	0.1 (0.1)	<0.001

*All participants: any participant enrolled in Livongo DPP who attended lesson 1 and provided a starting weight.

†Highly engaged participants: participants who met the CDC high-engagement criteria by completing nine lessons within months 1–6 of the program and three lessons within months 7–12 of the program with a minimum of 9 months between first and final lessons completed.²¹

‡Minimally engaged participants: all participants not meeting the CDC high-engagement criteria.²¹

CDC, Centers for Disease Control and Prevention; DPP, diabetes prevention program; WL, weight loss.