Table 3.

Results of Multilevel LMM for MI constructs associations with Psychosocial Behaviors^a,b

	MI Spirit Estimated Mean (95% CI; p-value)	MIIC% Estimated Mean (95% CI; p-value)	Empathy Estimated Mean (95% CI; p-value)	Open questions Estimated Mean (95% CI; p-value)	MI Consistent Estimated Mean (95% CI; p-value)
Want Lose Weight
Post-Visit	0.0[−0.1,0.1];0.69	0.1[−0.2,0.4];0.42	0.1[−0.0,0.2];0.10	0.0[−0.0,0.1];0.05	0.0[−0.0,0.0];0.30
Confident Lose Weight
Post-Visit	0.0[−0.0,0.1];0.42	0.1[−0.2,0.3];0.49	0.0[−0.1,0.1];0.87	−0.0[−0.0,0.0];0.85	0.0[−0.0,0.0];0.98
Want Improve Diet
Post-Visit	0.1[−0.0,0.2];0.11	0.2[−0.1,0.5];0.13	0.1[0.0,0.2];0.03	0.0[−0.0,0.1];0.06	0.0[−0.0,0.1];0.09
Confident Improve Diet
Post-Visit	0.0[−0.0,0.1];0.35	0.1[−0.2,0.3];0.44	0.0[−0.0,0.1];0.40	−0.0[−0.0,0.0];0.75	−0.0[−0.0,0.0];0.63
Want PA
Post-Visit	0.1[0.0,0.2];0.04	0.1[−0.2,0.4];0.48	0.1[0.0,0.2];0.03	0.0[−0.0,0.0];0.90	0.0[−0.0,0.1];0.16
Confident PA
Post-Visit	0.0[−0.1,0.1];0.82	0.1[−0.1,0.4];0.36	0.0[−0.1,0.1];0.95	−0.0[−0.1,0.0];0.07	0.0[−0.0,0.0];0.35
Perceived Empathy
Post-Visit	0.2[−0.3,0.7];0.37	−1.5[−2.8,−0.1];0.04	0.0[−0.4,0.5];0.83	0.1[−0.1,0.3];0.50	0.2[0.0,0.3];0.02
Autonomy Support
Post-Visit	0.6[−0.2,1.4];0.13	−1.5[−4.2,1.3];0.30	0.2[−0.5,1.0];0.57	0.1[−0.2,0.5];0.46	0.3[0.0,0.6];0.03

Covariates included (Tx arm, patient covariates (baseline psychosocial behavior for motivation and confidence behaviors, age, gender, race, mother's education) and physician covariates (race, gender, specialty, years since medical school, BMI and prior MI training status) (n=527 physician/adolescent audio-recorded conversations

Missing data: 1 missing baseline Want Diet; n=377 for Autonomy support as was not collected in Baseline Phase, in addition 1 missing Autonomy Support; 52 patients dropped in MIIC% analysis due to missing MIIC%; 34 patients dropped due to missing covariates.