Table A.12.1.

Comparison of outcomes by site and Medicaid vs. Non-Medicaid enrollment

	Nonuser			Current User			Incidence Rate Ratio			Incidence Difference
	Events	Person Years	I/105	Events	Person Years	I/105	IRR	95% CI		RD	95% CI
Tennessee	29	470,853	6.16	3	77,541	3.87	0.63	0.19	2.06	−2.29	−8.09	3.51
Kaiser	10	329,872	3.03	0	77,773	0.00	n/a	n/a	n/a	−3.03	−6.90	0.84
I3	11	651,489	1.69	0	176,264	0.00	n/a	n/a	n/a	−1.69	−3.61	0.23
Washington	2	145,748	1.37	4	42,088	9.50	6.93	1.27	37.86	8.13	2.00	14.26
Medicaid	31	616,601	5.03	7	119,629	5.85	1.16	0.51	2.64	0.82	−3.61	5.25
Other	21	981,361	2.14	0	254,037	0.00	n/a	n/a	n/a	−2.14	−3.94	−0.34

I=Incidence

PY=Person years

IRR=Incidence rate ratio

CI=confidence interval

RD=Rate difference