SIR Model Explorer
CLABSI, CAUTI, MRSA Bacteremia LabID, CDI LabID
CLABSI Risk Adjustment (IRFs)
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 | -7.9053 | 0.1342 | <0.0001 |
| Proportion of admissions with orthopedic conditions1: <0.070 | 0.6922 | 0.2227 | 0.0019 |
| Proportion of admissions with orthopedic conditions1: ≥0.070 | REFERENT | – | – |
| Proportion of admissions on a ventilator1: >0 | 0.8177 | 0.2415 | 0.0007 |
| Proportion of admissions on a ventilator1: =0 | REFERENT | – | – |
| Proportion of admissions with stroke1: <0.215 | -0.3735 | 0.1903 | 0.0497 |
| Proportion of admissions with stroke1: ≥0.330 | -0.6406 | 0.2926 | 0.0286 |
| Proportion of admissions with stroke1: 0.215-0.329 | REFERENT | – | – |
1 Proportion of annual admissions with primary diagnoses are taken from the Annual IRF Survey [PDF – 1MB] and are calculated as: # of admissions with the primary diagnosis (other neurologic conditions, stroke, non-traumatic spinal cord dysfunction, or brain dysfunction) / total # of annual admissions.