Urinary Tract Infection

January 2024

7 - 1

Urinary Tract Infection (Catheter-Associated Urinary Tract

Infection [CAUTI] and Non-Catheter-Associated Urinary Tract

Infection [UTI]) Events

Table of Contents

Introduction .................................................................................................................................................. 1

Definitions ..................................................................................................................................................... 2

Figure 1: Associating Catheter Use to UTI .................................................................................................... 3

Table 1. Urinary Tract Infection Criteria ....................................................................................................... 4

Monthly Summary Data .............................................................................................................................. 10

Table 2: Denominator Data Collection Methods ........................................................................................ 10

Data Analyses .............................................................................................................................................. 13

Rates and Ratios .......................................................................................................................................... 14

Additional Resources .................................................................................................................................. 15

Table 3. CAUTI Measures Available in NHSN .............................................................................................. 16

References .................................................................................................................................................. 17

Introduction

Urinary tract infections (UTIs) are the fifth most common type of healthcare-associated infection, with an

estimated 62,700 UTIs in acute care hospitals in 2015. UTIs additionally account for more than 9.5% of

infections reported by acute care hospitals

1

. Virtually, all healthcare-associated UTIs are caused by

instrumentation of the urinary tract.

Approximately 12%-16% of adult hospital inpatients will have an indwelling urinary catheter (IUC) at some

time during their hospitalization, and each day the indwelling urinary catheter remains, a patient has a

3%-7% increased risk of acquiring a catheter-associated urinary tract infection (CAUTI).

2-3

CAUTIs can lead to such complications as prostatitis, epididymitis, and orchitis, cystitis, pyelonephritis,

gram-negative bacteremia, endocarditis, vertebral osteomyelitis, septic arthritis, endophthalmitis, and

meningitis in patients. Complications associated with CAUTIs cause discomfort to the patient, prolonged

hospital stay, and increased cost and mortality

4

. It has been estimated that each year, more than 13,000

deaths are associated with UTIs.

5

Prevention of CAUTIs is discussed in the CDC/HICPAC document, Guideline for Prevention of Catheter-

associated Urinary Tract Infection.

6

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Settings: Surveillance may occur in any inpatient location(s) where denominator data can be collected,

such as critical intensive care units (ICU), specialty care areas (SCA), step- down units, wards, inpatient

rehabilitation locations, and long-term acute care locations. Neonatal ICUs may participate, but only off

plan (not as a part of their monthly reporting plan). A complete listing of inpatient locations and

instructions for mapping are located in the CDC Locations and Descriptions chapter.

Note: Post-discharge surveillance for CAUTI is not required. However, if a post-discharge CAUTI is

discovered, any CAUTI with a date of event (DOE) on the day of discharge or the next day is attributable to

the discharging location and should be included in any CAUTI reported to NHSN for that location (see

Transfer Rule Chapter 2). No additional indwelling urinary catheter (IUC) days are reported.

Refer to the NHSN Patient Safety Manual, Chapter 2 Identifying Healthcare Associated Infections in NHSN

and Chapter 16 NHSN Key Terms for definitions of the following universal concepts for conducting HAI

surveillance.

I. Date of event (DOE)

II. Healthcare associated infection (HAI)

III. Infection window period (IWP)

IV. Present on admission (POA)

V. Repeat infection timeframe (RIT)

VI. Secondary BSI attribution period (SBAP)

VII. Location of Attribution (LOA)

VIII. Transfer rule

Definitions:

Urinary tract infections: (UTI) are defined using Symptomatic Urinary Tract Infection (SUTI) criteria and

Asymptomatic Bacteremic UTI (ABUTI). (See Table 1).

Note: UTI is a primary site of infection; it is never considered secondary to another site of infection.

Indwelling Urinary Catheter (IUC): A drainage tube that is inserted into the urinary bladder through the

urethra, is left in place, and is connected to a drainage bag (including leg bags). IUCs are often called Foley

catheters. IUCs used for intermittent or continuous irrigation are also included in CAUTI surveillance.

Catheters not meeting the IUC definition may include but is not limited to condom or straight in-and-out

catheters. Nephrostomy tubes, ileoconduits, or suprapubic catheters do not meet the IUC definition

unless an IUC is also present.

Catheter-associated UTI (CAUTI): A UTI where an indwelling urinary catheter (IUC) was in place for more

than two consecutive days in an inpatient location on the date of event or the day before, with day of

device placement being Day 1*. If an IUC was in place for more than two consecutive days in an inpatient

location and then removed, the date of event for the UTI must be the day of device discontinuation or the

next day for the UTI to be catheter-associated.

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*If the IUC was in place prior to inpatient admission, the catheter day count that determines catheter –

association begins with the admission date to the first inpatient location allowing for consistency with

device denominator count (see Table 2 Denominator Data Collection Methods) collection.

Example of Associating Catheter Use to UTI:

A patient in an inpatient unit has an indwelling urinary catheter (IUC) inserted, and the following day is

the UTI date of event. The IUC on the date of event has not been in place for more than two consecutive

days in an inpatient location, therefore the UTI is not a CAUTI. Depending on the date of admission, the

UTI may be healthcare-associated. Please refer to SUTI 1b: Non-CAUTI.

Notes:

• SUTI 1b cannot be catheter-associated.

• Indwelling urinary catheters (IUCs) that are removed and reinserted: If, after an IUC removal, the

patient is without an IUC for at least 1 full calendar day (NOT to be read as 24 hours), then the IUC

day count will start anew. If instead, a new IUC is inserted before a full calendar day has passed,

the indwelling urinary catheter device day count, to determine eligibility for a CAUTI, will continue

uninterrupted.

Figure 1: Associating Catheter Use to UTI

Rationale: NHSN surveillance for infection is not aimed at a specific device; surveillance is aimed at

identifying risk to the patient that is the result of device use in general.

Notes:

• In the examples above, Patient A is eligible for a CAUTI beginning on March 31, through April 6

th

,

since an IUC was in place for some portion of each calendar day until April 6

th

. A UTI with the date

of event on April 6

th

would be a CAUTI since the IUC had been in place greater than two days and

was removed the day before the date of event.

• Patient B is eligible for a CAUTI on March 31 (IUC Day 3) through April 3. The IUC had been in

place for greater than two days and a HAI occurring on the day of device discontinuation, or the

following calendar day is considered a device-associated infection.

• If patient B did not have a CAUTI by April 3, the patient is not eligible for a CAUTI until April 6,

when the second IUC had been in place for greater than two days.

Indwelling

Urinary Catheter

= IUC

March

29

th

March

30

th

March

31

st

April 1

st

April 2

nd

April 3

rd

April 4

th

April 5

th

April 6

th

Patient A

IUC

(Day 1)

IUC

(Day 2)

IUC

(Day 3)

IUC

(Day 4)

IUC

removed

(Day 5)

IUC

inserted

(Day 6)

IUC

(Day 7)

IUC

removed

(Day 8)

NO IUC

Patient B

IUC

(Day 1)

IUC

(Day 2)

IUC

(Day 3)

IUC

(Day 4)

IUC

removed

(Day 5)

NO IUC

IUC

(Day 1)

IUC

(Day 2)

IUC

(Day 3)

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Table 1. Urinary Tract Infection Criteria

Criterion

Urinary Tract Infection (UTI)

SUTI 1a

Catheter-

associated

Urinary Tract

Infection

(CAUTI)

in any age

patient

Symptomatic UTI (SUTI)

Must meet at least one of the following criteria:

Patient must meet 1, 2, and 3 below:

1. Patient had an indwelling urinary catheter that had been in place for more than

2 consecutive days in an inpatient location on the date of event AND was either:

• Present for any portion of the calendar day on the date of event

†

,

OR

• Removed the day before the date of event

‡

2. Patient has at least one of the following signs or symptoms:

• fever (>38.0°C)

• suprapubic tenderness*

• costovertebral angle pain or tenderness*

• urinary urgency ^

• urinary frequency ^

• dysuria ^

3. Patient has a urine culture with no more than two species of organisms

identified, at least one of which is a bacterium of ≥10

5

CFU/ml (See Comments).

All elements of the SUTI criterion must occur during the IWP (See IWP Definition

Chapter 2 Identifying HAIs in NHSN).

†

When entering event into NHSN choose “INPLACE” for Risk Factor for IUC

‡

When entering event into NHSN choose “REMOVE” for Risk Factor for IUC

*With no other recognized cause (see Comments)

^ These symptoms cannot be used when catheter is in place. An IUC in place could

cause patient complaints of “frequency” “urgency” or “dysuria”.

Note:

• Fever is a non-specific symptom of infection and cannot be excluded from UTI

determination because it is clinically deemed due to another recognized cause.

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Criterion

Urinary Tract Infection (UTI)

SUTI 1b

Non-

Catheter-

associated

Urinary Tract

Infection

(Non-CAUTI)

in any age

patient

Patient must meet 1, 2, and 3 below:

1. One of the following is true:

• Patient has/had an indwelling urinary catheter, but it has/had not been in

place for more than two consecutive days in an inpatient location on the

date of event

†

OR

• Patient did not have an indwelling urinary catheter in place on the date of

event nor the day before the date of event

†

2. Patient has at least one of the following signs or symptoms:

• fever (>38°C)

• suprapubic tenderness*

• costovertebral angle pain or tenderness*

• urinary frequency ^

• urinary urgency ^

• dysuria ^

3. Patient has a urine culture with no more than two species of organisms

identified, at least one of which is a bacterium of ≥10

5

CFU/ml. (See Comments)

All elements of the SUTI criterion must occur during the IWP (See IWP Definition

Chapter 2 Identifying HAIs in NHSN).

†

When entering event into NHSN choose “NEITHER” for Risk Factor for IUC

*With no other recognized cause (see Comments)

^These symptoms cannot be used when an indwelling urinary catheter (IUC) is in place.

An IUC in place could cause patient complaints of “frequency” “urgency” or “dysuria”.

Note:

• Fever is a non-specific symptom of infection and cannot be excluded from UTI

determination because it is clinically deemed due to another recognized cause.

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Criterion

Urinary Tract Infection (UTI)

SUTI 2

CAUTI or Non-

CAUTI in

patients 1 year

of age or less

Patient must meet 1, 2, and 3 below:

1. Patient is < year of age (with

‡

or without an indwelling urinary catheter)

2. Patient has at least one of the following signs or symptoms:

• fever (>38.0°C)

• hypothermia (<36.0°C)

• apnea*

• bradycardia*

• lethargy*

• vomiting*

• suprapubic tenderness*

3. Patient has a urine culture with no more than two species of organisms

identified, at least one of which is a bacterium of ≥10

5

CFU/ml. (See Comments)

All elements of the SUTI criterion must occur during the IWP (See IWP Definition

Chapter 2 Identifying HAIs in NHSN).

‡

If patient had an indwelling urinary catheter (IUC) in place for more than two

consecutive days in an inpatient location and the IUC was in place on the date of event

or the previous day, the CAUTI criterion is met. If no such IUC was in place, UTI (non-

catheter associated) criterion is met.

*With no other recognized cause (See Comments)

Note: Fever and hypothermia are non-specific symptoms of infection and cannot be

excluded from UTI determination because they are clinically deemed due to another

recognized cause.

Comments

“Mixed flora” is not available in the NHSN master organism list and cannot be reported

as a pathogen to meet the NHSN UTI criteria. Additionally, “mixed flora” represents at

least two species of organisms and cannot be used to meet the NHSN UTI criteria. Any

additional organisms recovered from the same culture would be in addition to the mixed

flora, meaning there are at least three organisms present making the culture ineligible

for use to meet NHSN UTI criteria.

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Comments

The following excluded organisms cannot be used to meet the UTI definition:

 Any Candida species as well as a report of “yeast” that is not otherwise specified

 mold

 dimorphic fungi or

 parasites

An acceptable urine specimen may include the above organisms if one bacterium

with > 100,000 CFU/ml is also present. Additionally, these non-bacterial organisms

identified from a blood culture cannot be deemed secondary to a UTI since the

above non-bacterial organisms are excluded as organisms in the UTI definition.

 Suprapubic tenderness documentation - whether elicited by palpation

(tenderness-sign) or provided as a subjective complaint of suprapubic pain (pain-

symptom)- found in the medical record is acceptable to meet SUTI criterion if

documented in the medical record during the Infection Window Period.

 Lower abdominal pain or bladder or pelvic discomfort are examples of symptoms

that can be used as suprapubic tenderness. Generalized “abdominal pain” in the

medical record is too general and not to be interpreted as suprapubic

tenderness as there are many causes of abdominal pain.

 Left, right, or bilateral lower back or flank pain are examples of symptoms that

can be used as costovertebral angle pain or tenderness. Generalized "low back

pain" is not to be interpreted as costovertebral angle pain or tenderness

.

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Criterion

Urinary Tract Infection (UTI)

Asymptomatic Bacteremic Urinary Tract Infection (ABUTI)

(Any age patient)

Patient must meet 1, 2, and 3 below:

1. Patient with* or without an indwelling urinary catheter has no signs or symptoms

of SUTI 1 or 2 regardless of age.

2. Patient has a urine culture with no more than two species of organisms identified,

at least one of which is a bacterium of ≥10

5

CFU/ml (see Comment section

below).

3. Patient has organism identified** from blood specimen with at least one

matching bacterium to the bacterium at > 10

5

CFU/ml identified in the urine

specimen, or is eligible LCBI criterion 2 (without fever) and matching common

commensal(s) in the urine. All elements of the ABUTI criterion must occur during

the Infection Window Period (See Definition Chapter 2 Identifying HAIs in NHSN).

*Patient had an IUC in place for more than two consecutive days in an inpatient location

on the date of event, and IUC was in place on the date of event or the day before.

Catheter - associated ABUTI is reportable if CAUTI is in the facility’s reporting plan for

the location.

** Organisms identified by a culture or non-culture based microbiologic testing method

which is performed for purposes of clinical diagnosis or treatment (e.g., not Active

Surveillance Culture/Testing (ASC/AST).

Comments

“Mixed flora” is not available in the NHSN master organism list and cannot be reported as

a pathogen to meet the NHSN UTI criteria. Additionally, “mixed flora” represents at least

two species of organisms and cannot be used to meet the NHSN UTI criteria. Any

additional organisms recovered from the same culture would be in addition to the mixed

flora, meaning there are at least three organisms present making the culture ineligible for

use to meet NHSN UTI criteria.

Additionally, the following excluded organisms cannot be used to meet the UTI definition:

• Any Candida species as well as a report of “yeast” that is not otherwise specified

• mold

• dimorphic fungi or

• parasites

An acceptable urine specimen may include these excluded organisms if one bacterium of

>100,000 CFU/ml is also present. Additionally, these non-bacterial organisms identified

from blood cannot be deemed secondary to a UTI since they are excluded as organisms in

the UTI definition.

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Monthly Summary Data

Numerator Data: The Urinary Tract Infection (UTI) form (CDC 57.114) is used to collect and report each

CAUTI that is identified during the month selected for surveillance. The Instructions for Completion of

Urinary Tract Infection form include brief instructions for collection and entry of each data element on the

form. The UTI form includes patient demographic information and information on whether an indwelling

urinary catheter was present. Additional data include the specific criteria met for identifying the UTI,

whether the patient developed a secondary bloodstream infection, whether the patient died, and the

organisms isolated from cultures and their antimicrobial susceptibilities.

Reporting Instructions:

If no CAUTIs are identified during the month of surveillance, the “Report No Events” box must be checked

on the appropriate denominator summary screen, (for example, Denominators for Intensive Care Unit

(ICU)/Other Locations (Not NICU or SCA/ONC).

Denominator Data: Device days and patient days are used for denominators (See Key Terms chapter).The

method of collecting device-day denominator data may differ depending on the location of patients being

monitored. The following methods may be used:

Table 2: Denominator Data Collection Methods

Denominator Data

Collection Method

Details

Manual, Daily

(specifically, collected at

the same time every day

of the month)

Denominator data (patient days and device days) should be collected at

the same time, every day, for each location performing surveillance to

ensure that differing collection methods don’t inadvertently result in

device days being greater than patient days.

The Instructions for Completion of Denominators for Intensive Care Unit

(ICU)/Other Locations (Not NICU and SCA/ONC) and Instructions for

Completion of Denominators for Specialty Care Areas (SCA)/Oncology

(ONC) contain brief instructions for collection and entry of each data

element on the form.

Indwelling urinary catheter days, which are the number of patients with

an indwelling urinary catheter device, are collected daily, at the same time

each day, according to the chosen location using the appropriate form

(CDC 57.117 and 57.118). These daily counts are summed and only the

total for the month is entered into NHSN. Indwelling urinary catheter days

and patient days are collected separately for each of the locations

monitored.

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Denominator Data

Collection Method

Details

Manual, sampled

once/week (collected at

the same time on the

same designated day,

once per week)

To maximize staff resources on time spent collecting surveillance data,

once weekly sampling of denominator data to generate estimated urinary

catheter days may be used as an alternative to daily collection in non-

oncology ICUs and wards (see Notes below). Sampling may not be used in

SCA/ONC locations or NICUs. During the month, the number of patients in

the location (patient-days) and the number of patients with an indwelling

urinary catheter (urinary catheter-days) is collected on a designated day

each week (for example, every Tuesday), at the same time each day.

Evaluations of this method have repeatedly shown that collecting weekly

denominator data on Saturday or Sunday generates the least accurate

estimates of denominator data, and, therefore, Saturday and Sunday

should not be selected.

7-9

If the designated sampling collection day is

missed, collect the data the next available day instead.

The following must be collected and entered NHSN:

1. The monthly total for patient-days, collected daily

2. The sampled total patient-days

3. The sampled total urinary catheter-days

When these data are entered, the NHSN application will calculate an

estimate of urinary catheter-days.

Notes:

• To ensure the accuracy of estimated denominator data obtained

by sampling, only ICUs and ward locations with an average of 75

or more urinary catheter-days per month are eligible to use the

sampling method. A review of each location’s urinary catheter

denominator data for the past 12 months in NHSN will help

determine which locations are eligible to use the sampling

method.

• The accuracy of estimated denominator data generated by

sampling can be heavily influenced by incorrect or missing data.

Using the guidance in this protocol is essential to avoid erroneous

fluctuations in rates or Standardized Infection Ratios (SIRs) when

implementing data collection by sampling.

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Denominator Data

Collection Method

Details

Electronic

For any location, denominator data from electronic sources (for example,

urinary catheter days from electronic charting), may be used after

validation of a minimum three consecutive months proves the electronic

data to be within 5% (+/-) of the manually-collected, once a day counts.

Perform the validation of electronic counts separately for each location

conducting CAUTI surveillance.

When converting from one electronic counting system to another

electronic counting system, the new electronic system should be validated

against manual counts as above. If electronic counts for the new electronic

system are not within 5% of manual counts, resume manual counting and

continue working with IT staff to improve design of electronic

denominator data extraction (while reporting manual counts) until

concurrent counts are within 5% for 3 consecutive months.

Note: It is important to validate a new electronic counting system against

an existing electronic system can magnify errors and result in inaccurate

denominator counts.

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Data Analyses

All data that is entered into NHSN can be analyzed at event or summary level. The data in NHSN can be

visualized and analyzed in various ways, for example, descriptive analysis reports for both the

denominator and numerator data.

Types of CAUTI Analysis Reports

Standardized Infection Ratio

The Standardized Infection Ratio (SIR) is a summary measure used to track HAIs at a national, state, or

local level over time. The SIR adjusts for various facility and/or patient-level factors that contribute to HAI

risk within each facility. In HAI data analysis, the SIR compares the actual number of HAIs reported to the

number that would be predicted, given the standard population (i.e., NHSN baseline), adjusting for

several risk factors that have been found to be significantly associated with differences in infection

incidence. The number of predicted infections is calculated using probabilities from negative binomial

regression models constructed from 2015 NHSN data. For more information on SIR and the CAUTI

parameter estimates, please the SIR guide: https: //www.cdc.gov/nhsn/pdfs/ps-analysis-resources/nhsn-

sir-guide.pdf

SIR =



(



)





(



)



An SIR greater than 1.0 indicates that more HAIs were observed than predicted; conversely, an SIR less

than 1.0 indicates that fewer HAIs were observed than predicted.

While the CAUTI SIR can be calculated for single locations, the measure also allows you to summarize your

data by multiple locations, adjusting for differences in the incidence of infection among the location

types. For example, you will be able to obtain one CAUTI SIR adjusting for all locations reported. Similarly,

you can obtain one CAUTI SIR for all ICUs in your facility.

For more information on using the CAUTI SIR reports, please see the troubleshooting guide:

https://www.cdc.gov/nhsn/pdfs/ps-analysis-resources/clabsicauti_sirtroubleshooting.pdf.

For further information regarding the p-value and 95% confidence interval, please the following guide:

https://www.cdc.gov/nhsn/ps-analysis-resources/keys-to-success.html

Note: The SIR will be calculated only if the number of predicted CAUTIs (numPred) is ≥1 to help enforce a

minimum precision criterion.

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The Standardized Utilization Ratio (SUR)

The SUR, or Standardized Utilization Ratio is a summary measure used to track device use at a national,

state, or local, or facility level over time. The SUR adjusts for various facility and/or location-level factors

that contribute to device use. The method of calculating an SUR is similar to the method used to calculate

the Standardized Infection Ratio (SIR), a summary statistic used in NHSN to track healthcare-associated

infections (HAIs). In device-associated HAI data analysis, the SUR compares the actual number of device

days reported to what would be predicted, given the standard population (specifically, the NHSN

baseline), adjusting for several factors that have been found to be significantly associated with differences

in device utilization.

SUR =



(



)

ℎ 



(



)

ℎ 

In other words, an SUR greater than 1.0 indicates that more device days were observed than predicted;

conversely, an SUR less than 1.0 indicates that fewer device days were observed than predicted. SURs are

currently calculated in NHSN for the following device types: central lines, urinary catheters, and

ventilators.

More information regarding the CAUTI SUR model and the parameter estimates can be found at:

https://www.cdc.gov/nhsn/pdfs/ps-analysis-resources/nhsn-sur-guide-508.pdf

https://www.cdc.gov/nhsn/pdfs/ps-analysis-resources/run-interpret-sur-reports.pdf

Rates and Ratios

The CAUTI rate per 1000 urinary catheter days is calculated by dividing the number of CAUTIs by the

number of catheter days and multiplying the result by 1000.

CAUTI Rate =

.  

. ℎ 

* 1000

Device Utilization Ratio

The Urinary Catheter Utilization Ratio is calculated by dividing the number of urinary catheter days by the

number of patient days.

DUR =

.   ℎ 

.   

These calculations will be performed separately for the different types of ICUs, specialty care areas, and

other locations in the institution, except for neonatal locations. DURs are useful for the purposes of

tracking device use over shorter periods of time and for internal trend analyses.

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Descriptive Analysis

Descriptive analysis output options of numerator and denominator data, such as line listings, frequency

tables, and bar and pie charts are available in the NHSN application. SIRs, SURs and CAUTI rates and run

charts are also available.

Line List: https://www.cdc.gov/nhsn/pdfs/ps-analysis-resources/linelists.pdf

Frequency Tables: https://www.cdc.gov/nhsn/pdfs/ps-analysis-resources/frequencytables.pdf

Bar Chart: https://www.cdc.gov/nhsn/pdfs/ps-analysis-resources/BarCharts.pdf

Pie Chart: https://www.cdc.gov/nhsn/pdfs/ps-analysis-resources/PieChart.pdf

Guides on using NHSN analysis features are available at: www.cdc.gov/nhsn/PS-Analysis-

resources/reference-guides.html.

NHSN Group Analysis

NHSN Group Users can perform the same analysis as facility level users in NHSN. A few helpful tools in

NHSN for groups are listed in the resources below. These tools are guides on how to start and join a

Group; how to create a template to request data from facilities; how to determine the level of access

granted by the facility following the previous steps, and how to analyze the facilities data.

Group Analysis Resources

NHSN Group Users Page: https://www.cdc.gov/nhsn/group-users/index.html

Group User’s Guide to the Membership Rights Report: https://www.cdc.gov/nhsn/pdfs/ps-analysis-

resources/GroupAnalysisWebinar.pdf

Group User’s Guide to the Line Listing- Participation Alerts: https://www.cdc.gov/nhsn/pdfs/ps-analysis-

resources/group-alerts.pdf

Data Quality Resources

Data Quality Website: https://www.cdc.gov/nhsn/ps-analysis-resources/data-quality/index.html

Data Quality Manual: https://www.cdc.gov/nhsn/pdfs/pscmanual/Instructions_DQ.pdf

Data Quality Training: https://www.cdc.gov/nhsn/training/analysis/index.html

Additional Resources

Analysis Resources: https://www.cdc.gov/nhsn/ps-analysis-resources/index.html

Analysis Reference Guides: https://www.cdc.gov/nhsn/PS-Analysis-resources/reference-guides.html

NHSN Training: https://www.cdc.gov/nhsn/training/index.html

Data Quality Website: https://www.cdc.gov/nhsn/ps-analysis-resources/data-quality/index.html

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Table 3. CAUTI Measures Available in NHSN

Measure

Calculation

Application

CAUTI SIR

Number of Observed CAUTIs

Number of Predicted CAUTIs

Both location

specific and

summarized

measure

CAUTI Rates

Number of CAUTIs per locaiton

Number of Urinary Catheter Days per location

* 1000

Location specific

measure only

Urinary

Catheter SUR

Number of Observed Catheter Days

Number of Predicted Catheter Days

Both location

specific and

summarized

measure

DUR

Number of Catheter Days for a location

Number of Patient Days for a location

Location specific

measure only

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Lo E, Nicolle LE, Coffin SE, Gould C, Maragakis LL, Meddings J, et al. Strategies to prevent catheter-

associated urinary tract infections in acute care hospitals: 2014 update. Infection Control and Hospital

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Gould, CV., Umscheid, CA.,Agarwal, RK., Kuntz, G., Pegues, DA. “Guideline for Prevention of Catheter-

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9

See, I., et al. ID Week 2012 (Abstract #1284): Evaluation of Sampling Denominator

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