Healthcare-Associated Infections: Data
The Wisconsin Healthcare-Associated Infections (HAI) Prevention Program conducts statewide HAI surveillance and reports aggregate data to monitor trends. HAI data is reported by hospitals through the National Healthcare Safety Network, a national HAI reporting system developed and maintained by the CDC (Centers for Disease Control and Prevention).
This webpage contains Wisconsin HAI reports and other data.
Wisconsin HAI Prevention Program annual reports
View Wisconsin statewide data in the Healthcare-Associated infections (HAIs) Prevention Program Annual Reports, P-00340.
For information on national HAI data, visit the CDC's NHSN Data and Reports page.
Wisconsin standardized infection ratios (SIRs)
The SIR is the ratio of the number of observed HAIs to the number of predicted infections. The SIR is risk-adjusted to account for the underlying risk of infection in the population being measured. Below are SIRs for selected HAIs. The SIR enables “apples to apples” comparisons of HAI data across facilities and hospital unit types, as well as comparisons with state and national data.
Abbreviations
CAUTI: Catheter-associated urinary tract infection
CDI: Clostridioides difficile infection
CLABSI: Central line-associated bloodstream infection
COLO: Colon surgery
HPRO: Hip prosthesis surgery
HYST: Abdominal hysterectomy
KPRO: Knee prosthesis surgery
MRSA: Methicillin-resistant Staphylococcus aureus
SSI: Surgical site infection
VAE: Ventilator-associated event
Acute care hospitals
Critical access hospitals
SSI SIRs for acute care and critical access hospitals
Surgical site infections data
Surgical site infections (SSIs) are infections that occur after surgery, in the area of the body where the procedure took place. SSIs are currently the most frequently reported serious HAIs among Wisconsin hospitals. Many hospitals and quality improvement organizations are working together to reduce these infections.
The Wisconsin HAI Prevention Program provides frequently updated SSI data to monitor statewide progress toward SSI reduction.
Quarterly report—Q3 2024
The number of hospitals reporting equals 122. Data was accessed from the National Healthcare Safety Network (NHSN) on February 20, 2025. Data includes inpatient procedures only.
Adult
- Infections following all reported procedures: 280
- Total procedures performed: 16,586
- Wisconsin standardized infection ratio (SIR)
(Number of observed infections divided by the number of predicted infections based on 2015 national data.): 1.07
Pediatric
- Infections following all reported procedures: 7
- Total procedures performed: 405
- Wisconsin standardized infection ratio (SIR)
(Number of observed infections divided by the number of predicted infections based on 2015 national data.): 0.92
Questions about HAIs? Contact us!
HAI webpages | Phone: 608-267-7711 | Fax: 608-261-4976