Table 3a. State-specific Standardized Infection Ratios (SIRs) and facility-specific SIR summary measures, NHSN facilities reporting during 2011:
Central Line–associated Bloodstream Infections (CLABSI), All Locations ¹

The Central Line–associated Blood Stream Infections (CLABSI) Score is reported using a Standardized Infection Ratio (SIR). This calculation compares the number of central line infections in a hospital’s intensive care unit to a national benchmark based on data reported to NHSN from 2006 – 2008. The result is adjusted based on certain factors such as the type and size of a hospital or ICU.

• A score of less than 1 means that the hospital had fewer CLABSIs than hospitals of similar type and size.
• A score of 1 means the hospital's CLABSI score was no different than hospitals of similar type and size.
• A score of more than 1 means the hospital had more CLABSIs than hospitals of similar type and size.

Lower numbers are better. A score of zero (0) – meaning no CLABSIs – is best.

State	State NHSN Mandate2	Any Validation3	No. of Facilities Reporting	No. of Infections		SIR	95% CI for SIR		Facility–specific SIRs at Key Percentiles4
				Observed	Predicted		Lower	Upper	10%	25%	Median (50%)	75%	90%
Alabama	Yes	Yes	77	342	492.973	0.694	0.622	0.771	0.097	0.212	0.636	0.889	1.698
Alaska			9	27	37.712	0.716	0.472	1.042	.	.	.	.	.
Arizona			58	270	469.599	0.575	0.508	0.648	0.000	0.000	0.395	0.679	0.965
Arkansas	Yes	Yes	47	151	313.916	0.481	0.407	0.564	0.000	0.000	0.395	0.679	0.965
California	Yes	Yesa	350	2,806	4,963.174	0.565	0.545	0.587	0.000	0.179	0.457	0.839	1.296
Colorado	Yes	Yes	51	213	363.025	0.587	0.511	0.671	0.000	0.206	0.404	0.783	0.963
Connecticut	Yes	Yesa	30	159	253.459	0.627	0.534	0.733	0.000	0.256	0.517	0.904	1.309
Delaware	Yes	Yesa	8	50	93.553	0.534	0.397	0.705	.	.	.	.	.
Dist. of Columbia	Yes	Yesa	8	117	168.799	0.693	0.573	0.831	.	.	.	.	.
Florida			187	1,048	1,939.236	0.540	0.508	0.574	0.000	0.170	0.457	0.755	1.151
Georgia			104	693	848.860	0.816	0.757	0.880	0.000	0.359	0.603	0.939	1.299
Hawaii	Yes		15	21	81.440	0.258	0.160	0.394	.	.	.	.	.
Idaho			12	25	58.433	0.428	0.277	0.632	.	.	.	.	.
Illinois	Yes	Yesa	149	623	1,050.639	0.593	0.547	0.641	0.000	0.000	0.451	0.896	1.384
Indiana			88	411	708.300	0.580	0.526	0.639	0.000	0.000	0.348	0.508	0.885
Iowa			40	71	128.037	0.555	0.433	0.699	0.000	0.000	0.000	0.258	0.800
Kansas		Yes	43	94	216.413	0.434	0.351	0.532	.	.	.	.	.
Kentucky			71	249	346.779	0.718	0.632	0.813	0.000	0.000	0.382	0.829	0.921
Louisiana			73	298	409.713	0.727	0.647	0.815	0.000	0.086	0.649	0.956	1.400
Maine			22	96	97.054	0.989	0.801	1.208	.	.	.	.	.
Maryland	Yes	Yesa	47	297	443.061	0.670	0.596	0.751	0.000	0.144	0.462	0.944	1.489
Massachusetts	Yes	Yes	68	320	569.091	0.562	0.502	0.627	0.000	0.000	0.503	0.792	1.100
Michigan			94	317	875.392	0.362	0.323	0.404	0.000	0.029	0.221	0.495	0.777
Minnesota			50	104	257.782	0.403	0.330	0.489	0.000	0.160	0.300	0.436	0.655
Mississippi			43	178	293.906	0.606	0.520	0.701	0.000	0.313	0.524	0.690	1.347
Missouri			76	256	546.609	0.468	0.413	0.529	0.000	0.000	0.298	0.651	0.852
Montana			12	24	58.859	0.408	0.261	0.607	.	.	.	.	.
Nebraska			19	129	211.439	0.610	0.509	0.725	.	.	.	.	.
Nevada	Yes	Yesa	23	299	518.123	0.577	0.514	0.646	.	.	.	.	.
New Hampshire	Yes	Yes	24	35	54.651	0.640	0.446	0.891	.	.	.	.	.
New Jersey	Yes	Yes	72	422	579.844	0.728	0.660	0.801	0.000	0.337	0.632	1.122	1.697
New Mexico		Yesa	30	83	158.810	0.523	0.416	0.646	.	.	.	.	.
New York	Yes	Yesa	177	1,626	1,943.724	0.837	0.796	0.878	0.281	0.446	0.781	1.100	1.720
North Carolina		Yesa	93	511	894.276	0.571	0.523	0.623	0.000	0.000	0.394	0.716	0.899
North Dakota			6	21	56.270	0.373	0.231	0.571	.	.	.	.	.
Ohio			134	542	1,147.145	0.472	0.434	0.514	0.000	0.134	0.353	0.667	0.981
Oklahoma	Yes	Yesa	54	194	377.196	0.514	0.444	0.592	0.000	0.134	0.353	0.667	0.981
Oregon	Yes	Yes	44	75	195.277	0.384	0.302	0.481	0.000	0.000	0.228	0.451	0.857
Pennsylvania	Yes	Yes	177	1,256	2,590.605	0.485	0.458	0.512	0.000	0.197	0.422	0.728	1.098
Puerto Rico			19	198	140.632	1.408	1.219	1.618	.	.	.	.	.
Rhode Island			11	52	73.210	0.710	0.530	0.931	.	.	.	.	.
South Carolina	Yes	Yesa	66	538	761.846	0.706	0.648	0.768	0.139	0.351	0.608	0.912	1.563
South Dakota			13	29	65.442	0.443	0.297	0.636	.	.	.	.	.
Tennessee	Yes	Yes	96	652	932.237	0.699	0.647	0.755	0.000	0.317	0.546	1.026	1.389
Texas	Yes		266	1,073	1,919.930	0.559	0.526	0.593	0.000	0.000	0.427	0.808	1.187
Utah	Yes		25	113	167.951	0.673	0.554	0.809	.	.	.	.	.
Vermont			8	6	24.388	0.246	0.090	0.535	.	.	.	.	.
Virginia	Yes	Yes	81	447	638.340	0.700	0.637	0.768	0.000	0.223	0.495	1.008	1.398
Washington	Yes	Yesa	62	178	373.103	0.477	0.410	0.553	0.000	0.093	0.303	0.642	1.022
West Virginia	Yes		39	113	245.591	0.460	0.379	0.553	0.000	0.000	0.141	0.590	1.071
Wisconsin		Yesa	78	258	449.368	0.574	0.506	0.649	0.000	0.000	0.141	0.590	1.071
Wyoming			19	3	10.336	0.289	0.060	0.846	.	.	.	.	.
All US			3,468	18,113	30,615.577	0.592	0.583	0.600	0.000	0.171	0.469	0.825	1.280

Footnotes for Table 3a:

1. Data from all ICUs, wards (and other non-critical care locations), and NICUs. This excludes LTAC locations (or facilities) and inpatient rehabilitation locations (or facilities).
2. Yes indicates the presence of a state mandate to report CLABSI data from any ICU to NHSN at the beginning of 2011
3. Yes indicates that the state health department reported the completion of either or both of the following validation studies of NHSN CLABSI data reported from any ICU during the reporting period: data quality assessment of missing or implausible values along with state health department followup with identified facilities, and detection of outlier facilities along with state health department followup with identified facilities.
   Yes^a indicates that the state completed one or both of these activities and also conducted an audit of medical records. Information on validation efforts was requested from all states, regardless of the presence of a legislative mandate for the particular HAI type and location. Some states without mandatory reporting of a given HAI to the state health department have performed validation on NHSN data that is voluntarily shared with them by facilities.
4. Facility-specific key percentiles were only calculated if ≥20 facilities had ≥1.0 predicted HAI during the reporting period. If a single facility’s predicted number of HAIs (e.g., CLABSI) was ‹1.0, a facility-specific SIR was neither calculated nor included in the determinations of the distribution of facility-specific SIRs.