Table 4.

Mean Annual Rate, Crude and Adjusted Rate Ratios of Emergency Department Visits among Insured Adults in non-CHC vs. CHC Counties, 2003-2005.

	Number of Events, 2003- 2005		Mean Annual Rate		Unadjusted Model		Adjusted Model*
	No CHC	CHC	No CHC	CHC	RR	95% CI	RR	95% CI
All Emergency visits	1189135	179585	3696	3580	1.03	0.88- 1.21	1.06	0.92- 1.22
Ambulatory Care Sensitive Conditions	216435	32351	673	644	1.04	0.86- 1.26	1.07	0.90- 1.27
Non- Emergent or Emergent Primary Care Treatable	156077	22582	485	450	1.08	0.89- 1.30	1.09	0.91- 1.30
Emergent, ED Care Needed	62431	10103	194	201	0.96	0.83- 1.12	0.98	0.86- 1.13
Diabetes	8300	1449	26	29	0.89	0.71- 1.12	0.95	0.78- 1.17
Asthma	11543	1844	36	37	0.98	0.78- 1.23	1.06	0.86- 1.30
Hypertension	9402	1665	29	33	0.87	0.67- 1.14	1.01	0.81- 1.26

^*Rates calculated per 10,000 uninsured adults, based on year 2000 census estimates of uninsured; No CHC: 1,072,383 CHC: 167,219.

^**Poisson regression model adjusted for percent black population, percent population below poverty level, number of hospitals and overdispersion of variance.