Notes:

To meet the NHSN definitions, infections must be validated using the hospital acquired infection (HAI) standards \cite{0032a}. Infection rates  can  be  stratified  by  unit  types  further  defined  by  CDC \cite{0033}.  Infections  that  were  present  on  admission (POA) are not considered HAIs and not counted.

Data Collection:

CLABSI  and  Line  days  can  be  collected  through  surveillance  (at  least  once  per  month)  or  gathered  through electronic  documentation.    Denominators  documented  electronically  must  match  manual  counts  (+/-  5%)  for  a  3-month validation period.
CLABSI can be displayed as a Standardized Infection Ratios (SIR) using the following formula:
Expected infections are calculated by NHSN and available by location (unit type) from the baseline period.