Table 2.

Association of Patient and Provider Factors with Study Interval

Predictors		Rate Ratio			Pr > |t|
		Mean	[95% CI]
MRa Severity Level (relative to trace MR)
Mild MR		0.987	0.962	1.012	0.31
Moderate MR		0.892	0.851	0.936	<0.0001
Severe MR		0.664	0.610	0.724	<0.0001
Male Gender		0.989	0.965	1.014	0.40
Age Group (relative to Below 45)
45 to 54Yrs		0.997	0.957	1.039	0.89
55 to 64Yrs		1.041	0.985	1.099	0.15
65 to 74Yrs		1.074	1.014	1.139	0.0158
75 to 84Yrs		1.116	1.041	1.197	0.002
> 84Yrs		1.087	0.985	1.200	0.10
Race (relative to white patients)
Black		1.042	0.983	1.105	0.17
Hispanic		1.117	1.000	1.248	0.049
Asian		1.061	0.991	1.137	0.09
Others		0.666	0.600	0.739	<0.0001
Distance from Echo Lab (per 10mi)		0.986	0.985	0.987	<0.0001
Estimated Income (in $1000)		1.000	0.999	1.000	0.32
Change in LVESDb		0.997	0.995	1.000	0.0258
LAc Size		0.998	0.997	1.000	0.021
RVSPd		0.999	0.998	0.999	<0.0001
Multiple Valve Diseases		0.833	0.785	0.885	<0.0001
Secular Trend		1.034	1.026	1.042	<0.0001
Provider Specialty (relative to Cardiologists)
Other Specialty		0.843	0.656	1.084	0.18
PCPe		1.492	1.396	1.596	<0.0001
TTEf ordering Experience		1.012	1.001	1.023	0.0261

^aMitral Regurgitation (MR),

^bLeft Ventricular End Systolic Dimension,

^cLeft Atrial (LA),

^dRight-Ventricular Systolic Pressure (RVSP),

^ePrimary Care Physician (PCP),

^fTrans-Thoracic Echo (TTE)