Table 3. One Degree of Freedom Contrast Estimates of the Repeated Mixed Effects Multivariate Regression Model

Outcome	Limited Feedback Patient Group
	Baseline (n = 304)		4 Months (n = 214)			10 Months (n = 185)
	Estimate	SE	Estimate	SE	Change from Base P	Estimate	SE	Change from Base P
BMI^*	37.7	0.72	37.4	0.72	.014	37.6	0.72	.242
Systolic blood pressure^{^†}	128.8	1.75	128.9	1.81	.985	129.6	1.84	.450
Fitness^*	3.9	0.27	4.2	0.28	.010	4.2	0.28	.048
PrimeScreen^*	0.0	0.04	0.1	0.04	.000	0.1	0.04	.000
SF-12 mental score^*	0.0	0.12	0.2	0.12	.001	0.1	0.12	.304
HealthState^*	65.7	2.54	65.3	2.67	.827	69.5	2.73	.041

	Enhanced Feedback Patient Group
	Baseline (n = 306)		4 Months (n = 184)			10 Months (n = 192)
	Estimate	SE	Estimate	SE	Change from Base P	Estimate	SE	Change from Base P
BMI^*	36.9	0.72	36.7	0.72	0.115	36.6	0.72	0.054
Systolic blood pressure^{^†}	128.0	1.77	128.5	1.85	0.621	125.5	1.85	0.011
Fitness^*	3.9	0.28	4.0	0.28	0.245	3.9	0.28	0.771
PrimeScreen^*	0.0	0.04	0.1	0.04	0.000	0.2	0.04	0.000
SF-12 mental score^*	−0.2	0.12	0.0	0.12	0.027	0.0	0.12	0.031
HealthState^*	66.7	2.56	67.9	2.74	0.497	70.7	2.74	0.023

The models were adjusted for repeated measures, clustering of patients within practices, age, comorbidities, education, sex, income, marital status, race, and ethnicity.
↵* Multivariate model: P < .05, time.
↵† Multivariate model: P < .05, time by patient group interaction.
BMI, body mass index; SE, standard error; SF-12, 12-item Short Form.