Table 3.

Adjusted associations between patient characteristics and app usability.

Predictors effect (coefficients)		Satisfaction (SUS)	Efficiency (minutes)	Success (%)	Accuracy (%)
Characteristics		Model 1	Model 2	Model 3	Model 4
	Age per 10 years	−0.5	0.8a	−4.6b	−2.5
	Men vs women	0.1	1.7a	−6.9a	−0.1
	>High school vs ≤high schoolc	−6.4a	−1.2	10.5b	0.3
	Samsung vs not Samsung	1.5	−0.8	5.3	7.3
	Mobile phone comfort	0.6	−0.1	0.6	−0.3
	Diabetes type 2 vs type 1	−5.5	1.6	−4.7	−7.4
	Diabetes duration per 10-year diagnosis	3.6	0.5	−0.1	−8.5a
	Insulin duration per 10-year use	−1.3	0.6	−3.1	7.1
	HbA1cd	0.4	−0.2	1.8	0.7
	Blood glucose testing per day	−0.4	0.2	−1.7	−1.0
	Blood glucose testing prescribed per day	−0.2	−0.2	0.9	−1.2
	Motivation (TRSQe)	−0.4	−0.03	0.7	−0.1
Testing order		−3.9	−1.2	11.2b	3.6
App group		8.4a	−1.3b	9.8b	11.1a
Interaction order and app		8.3	0.9	−11.3	−0.5
Adjustedf R2		.14	.35	.31	.17

^aP<.05 statistical significance.

^bP<.01 statistical significance.

^cHighest completed education was high school or less.

^dHbA_1c: hemoglobin A_1c.

^eTRSQ: Treatment Self-Regulation Questionnaire.

^fObtained from linear regression model analysis without repeated measures.