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SIR Model Explorer
CLABSI, CAUTI, MRSA Bacteremia LabID, CDI LabID
CLABSI Risk Adjustment (CAHs)
The number of predicted CLABSIs under the 2022 baseline is calculated using a negative binomial regression model and is risk adjusted based on the following variables found to be statistically significant predictors of CLABSI incidence. Information about the statistical properties of NHSN risk adjustment models, including how the number of predicted events is calculated, is available in NHSN’s Guide to the SIR (2022 baseline) [PDF – 1MB].
| Parameter | Parameter Estimate | Standard Error | P-value |
| Intercept | -9.029 | 0.2331 | <.0001 |
| Select Critical care (CC) locations1
Medical Cardiac Critical Care – IN:ACUTE:CC:C Medical Critical Care – IN:ACUTE:CC:M Medical-Surgical Critical Care – IN:ACUTE:CC:MS |
1.598 | 0.3826 | <.0001 |
| Non-Critical care locations1 and average length of stay ≥8.9 days2 | 1.027 | 0.4244 | 0.0155 |
| Non-Critical care locations1 and average length of stay <8.9 days2 | REFERENT | – | – |
1 Refer to the exclusions table, at the hyperlink above, for additional information regarding CAH CLABSI risk adjustment model locations.
2 Average length of stay is calculated as: total # of annual patient days / total # of annual admissions, as reported on the Annual Hospital Survey [PDF – 1MB].
