Table 2.

Summary of Main Outcome Variables and Potential Mediators

Variable	Group	Outcome Measure in Time Point = (unadjusted)						Change over Time (adjusted)
		Time 1: Baseline			Time 3: Three Months Later			Time 3 – 1: From Baseline to 3 Months
		N = 188	Mean (SD)	Between group P-value	N = 176	Mean (SD)	Between group P-value	Mean (95% CI)	Within Group P-value	Between group P-value
Medication Adherence (MA)	Print	95	83.9 (19.2)	0.45	89	89.7 (11.9)	0.86	5.7 (2.5 to 8.8)	<0.001	0.33
	iDecide	93	87.2 (13.7)		87	90.5 (10.8)		3.4 (0.2 to 6.6)	0.036
MAIN OUTCOME VARIABES
Satisfaction with Medication Information (SMI)	Print	95	77.4 (28.7)	0.10	89	87.6 (17.9)	0.29	10.2 (4.5 to 15.9)	<0.001	0.007
	iDecide	93	68.6 (33.4)		87	90.4 (17.2)		21.5 (15.7 to 27.3)	<0.001
Medication Knowledge (MK)	Print	95	34.8 (17.4)	0.93	89	45.7 (21.8)	0.84	10.8 (6.4 to 15.1)	<0.001	0.51
	iDecide	93	34.8 (17.6)		87	47.4 (18.5)		12.8 (8.4 to 17.2)	<0.001
Decisional Conflict (DC)	Print	95	60.7 (16.2)	0.07	89	72.3 (13.2)	0.53	11.5 (8.2 to 14.8)	<0.001	0.3
	iDecide	93	56.6 (15.7)		86	70.9 (13.7)		14.1 (10.7 to 17.4)	<0.001
POTENTIAL MEDIATORS
Self-Efficacy (SE)	Print	95	75.0 (19.2)	0.98	89	80.0 (16.6)	0.05	4.8 (1.8 to 7.7)	0.002	0.13
	iDecide	93	74.6 (19.3)		87	83.3 (19.5)		8.1 (5.0 to 11.1)	<0.001
Diabetes Distress (DD)	Print	95	68.0 (26.5)	0.21	89	66.5 (30.7)	0.05	−1.6 (−6.9 to 3.7)	0.555	<0.001
	iDecide	93	62.7 (28.3)		87	76.9 (22.3)		14.1 (8.7 to 19.5)	<0.001

Note: Means of each outcome measure at each time point are unadjusted. Means in changes in each outcome measure are estimated from linear mixed-effect models, adjusted for baseline health literacy. All self-reported scales have a range of 0–100 with more positive outcomes reflected by higher numbers (e.g., less medication decisional conflict, higher levels of self-reported medication adherence, and lower diabetes distress are closer to 100). P-values are bolded if less than 0.05.