Table S2.

Logistic regression analysis on the association between outcome expectancy, time preference, their product, and patient self-management

Self-managing behavior	Predicting variables
	Outcome expectancy		Time preference		OE × TP
	OR	95% CI	OR	95% CI	OR	95% CI
Weigh oneself (≥ once per week =1)	1.31	1.02, 1.70	0.96	0.80, 1.15	1.03	0.99, 1.08
Wound checking (≥ once per week =1)	0.95	0.73, 1.23	0.89	0.74, 1.07	1.02	0.98, 1.07
Blood sugar (≥ once per week =1 or ≥ daily when treated with insulin =1)	0.96	0.71, 1.29	0.84	0.67, 1.04	1.04	0.98, 1.09
Blood pressure (≥ once per week =1)	1.19	0.91, 1.55	0.91	0.76, 1.10	1.03	0.98, 1.08
Keeping diabetes diary (yes =1)	1.13	0.82, 1.57	1.07	0.86, 1.35	1.00	0.95, 1.06
Diet (yes =1)	1.21	0.77, 1.92	0.97	0.70, 1.33	1.03	0.95, 1.11
Continuous intermediate outcomes	β	CI	β	CI	β	CI
Score (0–6)	0.09	−0.10, 0.28	−0.13	−0.27, 0.01	0.04	0.003, 0.07

Notes: Results are adjusted for age, sex, education, participation in an educational program, and whether the participant received insulin or not. Predictors are scaled from 1 to 4 with 1= the lowest expression and 4= the highest expression of the respective predictor. Because the highest score of the combined variables should represent the highest expected utility, TP was recorded from 1= “very high time preference” to 4= “very low time preference” when combined with OE. Values significant at a level of P<0.05 are given in bold.

Abbreviations: OE, outcome expectancy; TP, time preference.