NSIH - Clostridium difficile (NSIH-CDIF)
- from 01/07/2025 - 31/12/2025
- Status: active
- Unique ID: patient ID, admission date and date of onset of CDI symptoms
- How to create a CSV file for this data collection?
- Start date: 30/06/2025
Start date
Not to be included in the CSV.
Technical specs
Format:
DD/MM/YYYY
CSV column name:
start_date
Default value:
2025-07-01
Only when:
Required:
false
Read only
Validation
- The date of onset of CDI symptoms must be during the data collection period (error)
- If symptoms (diarrhea) present upon admission=1/yes, then date of admission must be during the data collection period (error)
- Admission date in hospital needs to be during the data collection period (warning)
- Admission date in ward needs to be during the data collection period (warning)
End date
Not to be included in the CSV.
Technical specs
Format:
DD/MM/YYYY
CSV column name:
end_date
Default value:
2025-12-31
Only when:
Required:
false
Read only
Validation
- The date of onset of CDI symptoms must be during the data collection period (error)
- If symptoms (diarrhea) present upon admission=1/yes, then date of admission must be during the data collection period (error)
- Admission date in hospital needs to be during the data collection period (warning)
- Admission date in ward needs to be during the data collection period (warning)
Automatically generated code for the reference laboratory
Not to be included in the CSV.
Help
This ID is automatically generated and is composed of (a part of) the NIHDI number of your institution and an incremental number.
Technical specs
CSV column name:
id_for_reference_centre
Computed:
Required:
false
1 Patient
Responsible infection control physician
Help
This is a purely operational question, which is not scientifically required.
Technical specs
CSV column name:
responsible_infection_control_physician
Length:
11
Reference list:
PHYSICIAN
Required:
true
Mapping of the clinical building blocks (indicative only)
Concept:
be.en.hd.Caregiver
Data element:
CareGiverIdentificationNumber
National registry ID of the patient
Help
Unique identifier of the national registry (nn.nn.nn-nnn.nn). Can be found on the back of the patient's identity card and starts with year of birth (yy) / month (mm) / day (dd). This information is never transferred to WIV-ISP. In case the patient does not have a national registry id or the id is not known, an identifier can be automatically generated based on the 'name', 'first name', 'date of birth' and 'sex'. In this case, these four fields are mandatory.
Technical specs
CSV column name:
patient_id
Required:
true
Mapping of the clinical building blocks (indicative only)
Concept:
be.en.hd.Patient
Data element:
PatientIdentificationNumber
Validation
The validity of the national register number is checked with the mod97 check.
Fields
Section help
Unique identifier of the national registry (nn.nn.nn-nnn.nn). Can be found on the back of the patient's identity card and starts with year of birth (yy) / month (mm) / day (dd). This information is never transferred to WIV-ISP. In case the patient does not have a national registry id or the id is not known, an identifier can be automatically generated based on the 'name', 'first name', 'date of birth' and 'sex'. In this case, these four fields are mandatory.
Internal patient ID
Help
This field can be used to enter an internal ID or reference number. It is available for internal use only and is not transferred to Healthdata. If there is an integration between HD4DP and your organisation's patient administration system, additional patient identification information such as date of birth, sex and SSIN can be automatically enriched based on this internal patient ID. Please do not encode the social security identification number (SSIN) in this field. The SSIN must be encoded in the field 'National registry ID of the patient'.
Technical specs
CSV column name:
patient_id|internal_patient_id
Length:
50
Required:
false
Mapping of the clinical building blocks (indicative only)
Concept:
na
Data element:
na
Generated
Help
The patient_id|generated column can be set to 'TRUE' for an automatically generated patient_id.This column should only be added in case the patient_id is empty. If the column is set to 'TRUE', a patient_id is automatically generated based on the name, first name, date of birth and sex of the patient.
Technical specs
CSV column name:
patient_id|generated
Required:
false
Options
| Label | Value |
| Yes | TRUE |
| No | FALSE |
Name
Help
The name of the patient is never transferred to Healthdata and is available for your information only.
Technical specs
CSV column name:
patient_id|name
Length:
50
Required:
noSSIN(Needed only if no national register number is entered)
Mapping of the clinical building blocks (indicative only)
Concept:
be.en.hd.Patient
Data element:
LastName
First name
Help
The first name of the patient is never transferred and is available for your information only.
Technical specs
CSV column name:
patient_id|first_name
Length:
50
Required:
noSSIN(Needed only if no national register number is entered)
Mapping of the clinical building blocks (indicative only)
Concept:
be.en.hd.Patient
Data element:
FirstNames
Date of birth
Help
If a national registry ID has been encoded, the date of birth is automatically extracted.
Technical specs
Format:
DD/MM/YYYY
CSV column name:
patient_id|date_of_birth
Required:
true
Mapping of the clinical building blocks (indicative only)
Concept:
be.en.hd.Patient
Data element:
DateOfBirth
Sex
Technical specs
CSV column name:
patient_id|sex
Required:
true
Options
| Label | Value |
| Male | M |
| Female | F |
| Unknown | U |
Mapping of the clinical building blocks (indicative only)
Concept:
be.en.hd.Patient
Data element:
Gender
Place of residence
Help
This field is automatically filled in in case of a computerised link with the national registry. Only to be filled in manually if useful for internal use.
Technical specs
CSV column name:
patient_id|place_of_residence
Length:
5
Reference list:
POSTAL_CODE
Required:
false
Mapping of the clinical building blocks (indicative only)
Concept:
be.en.hd.Patient
Data element:
Postcode
Deceased?
Help
This field is automatically filled in in case of a computerised link with the national registry. Only to be filled in manually if useful for internal use.
Technical specs
CSV column name:
patient_id|deceased
Required:
false
Mapping of the clinical building blocks (indicative only)
Concept:
be.en.hd.Patient
Data element:
DeathIndicator
Validation
- The patient outcome is not valid for a patient who is still alive (warning)
- The patient outcome is not valid for a patient who is dead (warning)
Options
| Label | Value |
| Yes | TRUE |
| No | FALSE |
Date of death
Help
Only to be filled in if useful for internal use.
Technical specs
Format:
DD/MM/YYYY
CSV column name:
patient_id|date_of_death
Only when:
Required:
false
Mapping of the clinical building blocks (indicative only)
Concept:
be.en.hd.Patient
Data element:
DateOfDeath
2 Stay
Admission ID
Help
Only to be filled in if useful for internal use.
Technical specs
CSV column name:
admission_id
Length:
100
Required:
false
Mapping of the clinical building blocks (indicative only)
Concept:
na
Data element:
na
Admission date in hospital
Technical specs
Format:
DD/MM/YYYY
CSV column name:
admission_date
Required:
true
Mapping of the clinical building blocks (indicative only)
Concept:
be.en.hd.Contact
Data element:
StartDateTime
Validation
- If symptoms (diarrhea) present upon admission=1/yes, then date of admission must be during the data collection period (error)
- Admission date in hospital cannot be after admission date in ward (error)
- Admission date in hospital cannot be after discharge date (error)
- Admission date in hospital cannot be after date of onset of CDI symptoms (error)
- Admission date in ward cannot be in the future (error)
- Admission date in hospital cannot be in the future (error)
- Admission date in hospital needs to be during the data collection period (warning)
- Admission date in ward needs to be during the data collection period (warning)
Admission date in ward where CDI occurred
Help
Only if different from admission date in hospital
Technical specs
Format:
DD/MM/YYYY
CSV column name:
ward_admission_date
Required:
false
Mapping of the clinical building blocks (indicative only)
Concept:
be.en.hd.Contact
Data element:
StartDateTime
Validation
- Admission date in hospital cannot be after admission date in ward (error)
- Admission date in ward cannot be in the future (error)
- Admission date in ward needs to be during the data collection period (warning)
NIHDI-code of the data provider institution
Not to be included in the CSV.
Technical specs
CSV column name:
installation_id
Length:
100
Computed:
Required:
false
Read only
Mapping of the clinical building blocks (indicative only)
Concept:
be.en.hd.HealthcareProvider
Data element:
HealthcareProviderIdentificationNumber
Campus number
Help
If you have communicated you do not longer wish to register per campus, then only the main campus is automatically listed here. If you still register per campus, you have to select the correct campus from the drop-down list. If you want to stop registering per campus, please contact support.healthdata@wiv-isp.be.
Technical specs
CSV column name:
site_number
Length:
100
Reference list:
SITE
Required:
true
ID of ward where CDI occurred
Help
If the ward ID does not appear in the drop-down list (e.g. in case of reorganization or moving of wards or hospital) please contact Healthdata Support (Support.Healthdata@wiv-isp.be, tel. 02/793 01 42) to add this/these ward ID(s) and if necessary to remove old ward ID(s).
Technical specs
CSV column name:
ward_id
Length:
100
Reference list:
WARD
Required:
nosocomial
Mapping of the clinical building blocks (indicative only)
Concept:
na
Data element:
na
Specialty of ward where CDI occurred
Help
If the specialty of ward does not appear in the drop-down list please contact Healthdata Support (Support.Healthdata@wiv-isp.be, tel. 02/793 01 42) to add this specialty.
Technical specs
CSV column name:
ward_type
Length:
200
Reference list:
SPECIALTY_DETAILED
Required:
nosocomial
Mapping of the clinical building blocks (indicative only)
Concept:
be.en.hd.HealthcareProvider
Data element:
DepartmentSpecialty
Discharge date from hospital or end date of follow-up
Help
Date the patient was discharged from the hospital (alive or deceased). Date of end of follow-up if the patient was still hospitalised and alive at the end of the surveillance period (maximum one month after the end of the surveillance period).
Technical specs
Format:
DD/MM/YYYY
CSV column name:
discharge_date
Required:
false
Mapping of the clinical building blocks (indicative only)
Concept:
be.en.hd.Contact
Data element:
EndDateTime
Validation
- Admission date in hospital cannot be after discharge date (error)
- Date of onset of CDI symptoms cannot be after discharge date (error)
- Discharge date cannot be in the future (error)
- Discharge date is more than one year ago (warning)
3 Infection
Symptoms (diarrhea) present upon admission
Technical specs
CSV column name:
symptoms_diarrhea_present_upon_admission
Required:
true
Options
| Label | Value |
| Yes | 1 |
| No | 0 |
| Unknown | 9 |
Validation
- The date of onset of CDI symptoms must be during the data collection period (error)
- If symptoms (diarrhea) present upon admission=1/yes, then date of admission must be during the data collection period (error)
Date of onset of diarhea/symptoms
Help
This is mandatory if symptom onset was during current hospitalisation, but not recorded if signs/symptoms were present on admission.
Technical specs
Format:
DD/MM/YYYY
CSV column name:
infection_date
Only when:
Required:
true
Mapping of the clinical building blocks (indicative only)
Concept:
be.en.hd.TransferConcern
Data element:
ProblemStartDate
Validation
- The date of onset of CDI symptoms must be during the data collection period (error)
- Date of onset of CDI symptoms cannot be after discharge date (error)
- Admission date in hospital cannot be after date of onset of CDI symptoms (error)
- Date of onset of CDI symptoms cannot be after sampling date (error)
- Date of onset of CDI symptoms cannot be in the future (error)
- Date of onset of CDI symptoms is more than one year ago (warning)
Recurrent case
Help
Choose yes if positive laboratory tests for CDI in diarrhoeal stools after the end of treatment for CDI occurring > 2 weeks and < 8 weeks following the onset of a previous episode.
Technical specs
CSV column name:
recurrent_case
Required:
true
Options
| Label | Value |
| Yes | 1 |
| No | 0 |
| Unknown | 9 |
Mapping of the clinical building blocks (indicative only)
Concept:
na
Data element:
na
Presumed case origin
Help
o Care facility (acute or chronic) if onset of symptoms more than 2 days after admission to this facility, OR within 4 weeks after leaving this facility. o Other healthcare facility e.g. ambulatory patient, dialysis patient, or patient having regular contacts with care facility. o Community: A case with onset of symptoms outside of a care facility, for a patient who has not been admitted to a care facility in the previous 12 weeks. o Origin undetermined: In case of a patient discharged from the hospital 4 to 12 weeks before the onset of symptoms. o Origin unknown: Insufficient information to answer this question.
Technical specs
CSV column name:
infection_source
Required:
true
Options
| Label | Value |
| Community | 1 |
| Acute care facility | 2 |
| Origin undetermined | 3 |
| Long-term care facility | 4 |
| Other healthcare facility (e.g. outpatient) | 5 |
| Origin unknown | 6 |
Mapping of the clinical building blocks (indicative only)
Concept:
na
Data element:
na
Complicated CDI
Help
Yes, if the CDI has one or more of the following consequence(s) : o Admission to a healthcare facility for treatment of community-onset CDI. o Admission to an intensive care unit for treatment of CDI or its complications (eg: shock). o Surgery (colectomy) for toxic megacolon, perforation or refractory colitis. o Death within 30 days, if CDI is the first cause, or contributed to death.
Technical specs
CSV column name:
complicated_course_of_cdi
Required:
true
Options
| Label | Value |
| Yes | 1 |
| No | 0 |
| Unknown | 9 |
Patient outcome
Help
o Alive, end of follow-up : The patient is still hospitalised at the end of the follow-up period (one month after the end of the surveillance period). o Death, CDI definitely contributed to death : If a causal relationship between CDI and death has been established. o Death, CDI possibly contributed to death : A causal relationship between CDI and death cannot be established, but it is plausible that CDI contributed to the death. o Death, no relation to CDI : It has been established that the cause of death is not related to CDI. o Death, relationship to CDI unknown : If lack of evidence that CDI contributed to death. o Unknown : Unknown patient outcome
Technical specs
CSV column name:
patient_outcome
Required:
true
Options
| Label | Value |
| Discharged alive | 1 |
| Alive, end of follow-up | 2 |
| Death, CDI definitely contributed to death | 3 |
| Death, CDI possibly contributed to death | 4 |
| Death, no relation to CDI | 5 |
| Death, relationship to CDI unknown | 6 |
| Unknown | 9 |
Validation
- The patient outcome is not valid for a patient who is still alive (warning)
- The patient outcome is not valid for a patient who is dead (warning)
4 Laboratory
Sample ID
Help
Only to be filled in if useful for internal use.
Technical specs
CSV column name:
sample_id
Length:
100
Required:
false
Sampling date
Help
Date of first positive stool sample.
Technical specs
Format:
DD/MM/YYYY
CSV column name:
sample_date
Required:
false
Mapping of the clinical building blocks (indicative only)
Concept:
be.en.hd.TransferLaboratoryResult
Data element:
DrawingDateTime
Validation
- Date of onset of CDI symptoms cannot be after sampling date (error)
- Sampling date cannot be in the future (error)
- Sampling date is more than one year ago (warning)
Test results
Fields
Glutamate dehydrogenase (GDH)
Technical specs
CSV column name:
test_result|glutamate_dehydrogenase_gdh
Required:
false
Options
| Label | Value |
| Positive | 1 |
| Negative | 0 |
| Not executed | 5 |
| Unknown | 9 |
Mapping of the clinical building blocks (indicative only)
Concept:
be.en.hd.TransferLaboratoryResult
Data element:
Result
Validation
- Test results: At least one of the test results must be positive. (error)
- Test results: A positive culture must be accompanied by another positive test result. (error)
Enzyme Immuno assay (EIA) – toxin on stool
Technical specs
CSV column name:
test_result|enzyme_immuno_assay_eia__toxin__on_stool
Required:
false
Options
| Label | Value |
| Positive | 1 |
| Negative | 0 |
| Not executed | 5 |
| Unknown | 9 |
Mapping of the clinical building blocks (indicative only)
Concept:
be.en.hd.TransferLaboratoryResult
Data element:
Result
Validation
- Test results: At least one of the test results must be positive. (error)
- Test results: A positive culture must be accompanied by another positive test result. (error)
Nucleic acid amplification testing (NAAT) (PCR) – on stool
Technical specs
CSV column name:
test_result|nucleic_acid_amplification_testing_naat__on_stool
Required:
false
Options
| Label | Value |
| Positive | 1 |
| Negative | 0 |
| Not executed | 5 |
| Unknown | 9 |
Mapping of the clinical building blocks (indicative only)
Concept:
be.en.hd.TransferLaboratoryResult
Data element:
Result
Validation
- Test results: At least one of the test results must be positive. (error)
- Test results: A positive culture must be accompanied by another positive test result. (error)
Culture
Technical specs
CSV column name:
test_result|culture
Required:
false
Options
| Label | Value |
| Positive | 1 |
| Negative | 0 |
| Not executed | 5 |
| Unknown | 9 |
Mapping of the clinical building blocks (indicative only)
Concept:
be.en.hd.TransferLaboratoryResult
Data element:
Result
Validation
- Test results: At least one of the test results must be positive. (error)
- Test results: A positive culture must be accompanied by another positive test result. (error)
- Test results: It is not possible to encode the result of EIA (toxin on culture) if no culture has been done (error)
Enzyme Immuno assay (EIA) – toxin on culture
Technical specs
CSV column name:
test_result|toxin_culture
Required:
false
Options
| Label | Value |
| Positive | 1 |
| Negative | 0 |
| Not executed | 5 |
| Unknown | 9 |
Mapping of the clinical building blocks (indicative only)
Concept:
be.en.hd.TransferLaboratoryResult
Data element:
Result
Validation
- Test results: At least one of the test results must be positive. (error)
- Test results: A positive culture must be accompanied by another positive test result. (error)
- Test results: It is not possible to encode the result of EIA (toxin on culture) if no culture has been done (error)
Strain transferred to Reference Laboratory UCL
Technical specs
CSV column name:
strain_transferred_to_reference_laboratory_ucl
Required:
false
Options
| Label | Value |
| Yes | 1 |
| No | 0 |
| Unknown | 9 |