Table 5.

Select Health Care Utilization Measures for IDD (n=1266) & Control Cohorts (n=2534).

		IDD Cohort	Control Cohort
Type of Health Service	Encounter Type	Mean Rate (SD)*	Mean Rate (SD)*	P-Value**
Primary Care	Primary Care Physician	1.88(1.93)	1.22(1.89)	<0.001
	Internal Medicine	1.29(1.84)	0.80(1.31)	<0.001
	Family Medicine	0.48(1.10)	0.37(1.44)	0.009
	Internal Medicine/Pediatrics	0.05(0.33)	0.04(0.25)	0.37
	Pediatrics	0.07(0.32)	0.01(0.30)	<0.001
Specialty Consultations	Neurology	0.35(1.09)	0.27(1.81)	0.083
	Orthopedic	0.20(0.61)	0.24(0.76)	0.040
	Gastroenterology	0.08(0.26)	0.12(0.57)	<0.001
	Pulmonary	0.05(0.28)	0.14(1.02)	<0.001
	Cardiology	0.13(0.63)	0.21(0.91)	0.004
	Genetics	0.060(0.247)	0.107(0.369)	0.015
	Ophthalmology	0.28(1.18)	0.27(1.25)	0.82
	OB/GYN	0.15(0.78)	0.22(1.00)	0.020
	General Surgery	0.06(0.25)	0.11(0.37)	<0.001
	Dermatology	0.13(0.60)	0.10(0.40)	0.095
	Pain Management	0.03(0.38)	0.15(1.02)	<0.001
	Geriatrics	0.012(0.164)	0.009(0.102)	0.65
Emergency Room		0.53(3.09)	0.82(4.10)	0.013
Hospitalizations		0.51(1.76)	1.06(2.77)	<0.001

^*Mean rate of visits per patient per year.

^**T-test