Table 2.

Results of linear mixed models of direct and diabetes distress–buffering effects of autonomy support on subsequent 12-month HbA_1c percent

	Direct-effect model			Distress-buffering model
	B	SE	P value	B	SE	P value
Predictor
Autonomy support	−0.16	0.07	0.023	−0.14	0.08	0.064
Diabetes distress	0.12	0.05	0.032	0.11	0.05	0.029
Autonomy support × diabetes distress				−0.13	0.06	0.027
Control variable
Age	−0.01	0.01	0.856	−0.01	0.01	0.878
Race/ethnicity*	0.17	0.15	0.248	0.18	0.15	0.229
Insulin use†	0.39	0.12	0.001	0.38	0.12	0.002
Time‡	0.01	0.01	0.972	0.01	0.01	0.961
Prior average HbA1c (%)	0.53	0.04	<0.001	0.52	0.04	<0.001

All coefficients are unstandardized and represent fixed effects. Boldface indicates significance at P < 0.05. The sample included 734 HbA_1c values clustered within 308 individuals.

*Non-Hispanic white vs. other race and/or ethnicity.

†No insulin use = 0 vs. insulin use = 1.

‡Months between assessment of predictor variables (i.e., diabetes distress, autonomy support) and each HbA_1c measurement.