Table 4.

Effects of the Service Agreement and Patient Characteristics on Primary Care Visits

Characteristics	Contrast	Estimate	SE	OR	95% CI
Sex
Female	SA vs non-SA	0.349	0.045	1.417^{^†}	(1.332, 1.508)
Male	SA vs non-SA	0.312	0.046	1.367^{^†}	(1.280, 1.459)
Age group
40 to 59 years	SA vs non-SA	0.436	0.028	1.547^{^†}	(1.493, 1.602)
60 to 79 years	SA vs non-SA	0.550	0.030	1.734^{^†}	(1.676, 1.794)
80 years and older	SA vs non-SA	0.467	0.041	1.595^{^†}	(1.517, 1.677)
Education
High school and some college	vs no-HS	−0.016	0.011	0.984	(0.963, 1.010)
Bachelor's degree and higher	vs no-HS	−0.061	0.011	0.941^{^†}	(0.920, 0.960)
Employed	vs Unemployed	−0.050	0.009	0.951^{^†}	(0.935, 0.970)
Insured	vs Uninsured	0.399	0.017	1.491^{^†}	(1.458, 1.524)
Comorbidity		0.347	0.004	1.415^{^†}	(1.407, 1.423)

CI, confidence interval; HS, high school; OR, odds ratio; SA, service agreement; SE, standard error.
* P values were from multiple 2-way interactions between SA and sex, and between SA and age group.
↵† P < .01.