NHS Screening Services - Bowel Screening Data. The aim of the bowel screening programme is to identify cancer early when treatment is more likely to be successful and also remove precancerous growths.

MDW Discover  > Bowel Screening Wales (SBSW) @ 368

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https://phw.nhs.wales/services-and-teams/screening/bowel-screening/programme-reports/annual-statistical-reports/

https://phw.nhs.wales/services-and-teams/screening/

Administrative and clinical information for bowel screening; currently offered to men and women who are resident in Wales aged between 60 and 74 years old.

Approx 70-80% coverage of Welsh population through GP registrations.

HDR UK

["Public Health Wales NHS Trust"]

Encrypted Anonymised Linking Field (ALF). This field is derived from by double encryption after splitting demographic information and clinical information; the first encryption occurs in NHS Wales Informatics Service (NWIS), and the second in SAIL. If the NHS number is not supplied in the data extract, then matching methods are applied; please refer to ALF_MTCH_PCT.

ALF_E

Encrypted Unique Bowel Screening Wales ID reference number, joined with Encrypted Anonymised Linking Field (ALF), to give demographic information for Bowel Screening individuals and tests/results by anonymised individual, as well as geographic data down to the LSOA level.

BSW_ALF

Anonymised Linked Field Match Percentage. This number is a match % score from probabalistic matching, when joining together anonymised data. This linkage process consists of matching against the Welsh Demographic Service by NHS number, where a valid number exists, and where there is no valid number then matching is attempted using first name, surname, date of birth, and postcode. This is an artificial score with no real-world meaning; i.e. a match of .99 does not mean there is a 99% chance the match is correct. This number is assigned when deriving the Encrypted Anonymised Linking Field.

ALF_MTCH_PCT

Anonymised Linked Field Status Code. This is assigned when deriving the Encrypted Anonymised Linking Field.

ALF_STS_CD

Date when the data made available i.e. date of loading

AVAIL_FROM_DT

EXTRACT_DT

FIELD_1

FIELD_2

FIELD_3

FIELD_4

This is the sex (gender) of person, employee or patient. Can potentially assist in correct identification of gender-specific primary cancer sites. Can potentially be different from gender identity as stated/assigned at birth.

GNDR_CD

LSOA2011_CD

PROCESSED_DATE

Encrypted Unique Bowel Screening Wales ID reference number for data linkage.

SYSTEM_ID_E

The date of the Monday that occurs prior, or on, the actual date of birth. Access to this data item is limited, however, as it can be used to calculate age at specific events. Possible errors in extract may include patients with events and event dates before WOB.

APPT_DATE

Contains details of all Consultations for a bowel screening test and the type of invitation. Data available from the end of October 2008 onwards. NOTE1 - Evidence does not support population screening for those aged over 74. Bowel Screening Wales does not facilitate for individuals to opt into the programme beyond the age of 74 years. Once the programme has fully optimised NHS hope to work with Welsh Government to allow for opt-ins. All men and women aged 60 to 74 who are registered with a GP in England and Wales are automatically sent a bowel cancer screening kit every 2 years. NOTE2 - In Wales, there is an improvement plan to offer screening to those aged 50- 59 by April 2023 and NHS have developed a plan to achieve this in stages.

BSW_CONSULTATION

APPT_TYPE

ATTENDED

Body Mass Index of the participant captured in the assessment form

Whether or not a participant is fit for colonoscopy

Type of kit issued with the invitation. F = FOB kit [guaiac Faecal Occult Blood Test - this is gradually being phased out in favour of FIT]; I = FIT [Faecal Immunochemical Test] immunochemical kit [sent when FOB shows an equivocal result].

KIT_TYPE

PLANNED_PROCDATE

TYPE_PROCEDURE

Date test kit result was authorised by BSW Laboratory

VALID_DATE

Age of participant at time of invitation date. NOTE - Evidence does not support population screening for those aged over 74. Bowel Screening Wales does not facilitate for individuals to opt into the programme beyond the age of 74 years. Once the programme has fully optimised NHS hope to work with Welsh Government to allow for opt-ins. For this reason age-value cannot go above age=99 due to table design. All men and women aged 60 to 74 who are registered with a GP in England and Wales are automatically sent a bowel cancer screening kit every 2 years.

AGE_INVITE

Contains details of all invitations for a bowel screening test and the type of invitation. Data available from the end of October 2008 onwards. NOTE1 - Evidence does not support population screening for those aged over 74. Bowel Screening Wales does not facilitate for individuals to opt into the programme beyond the age of 74 years. Once the programme has fully optimised NHS hope to work with Welsh Government to allow for opt-ins. All men and women aged 60 to 74 who are registered with a GP in England and Wales are automatically sent a bowel cancer screening kit every 2 years. NOTE2 - In Wales, there is an improvement plan to offer screening to those aged 50- 59 by April 2023 and NHS have developed a plan to achieve this in stages.

BSW_INVITATIONS

Gender of participant. F = female; M = Male; I = indeterminate.

GENDER

INVITE_TS

Type of recall invitation. C1 = Routine call [first invitation or invitation to participant who has not previously responded]; C2 = Routine recall [participant has previously responded]; CI2 = Recall using a FIT kit [previously an equivocal result].

RECALL_TYPE

Date the test kit was sent to participant. Some invitations are sent to participant either via an outsource company, and this is the date that the invitation was posted by them, or sent directly from Bowel Screening Wales.

SENT_DT

Contains details of all Appointment outcomes for a bowel screening test and the type of invitation. Data available from the end of October 2008 onwards. NOTE1 - Evidence does not support population screening for those aged over 74. Bowel Screening Wales does not facilitate for individuals to opt into the programme beyond the age of 74 years. Once the programme has fully optimised NHS hope to work with Welsh Government to allow for opt-ins. All men and women aged 60 to 74 who are registered with a GP in England and Wales are automatically sent a bowel cancer screening kit every 2 years. NOTE2 - In Wales, there is an improvement plan to offer screening to those aged 50- 59 by April 2023 and NHS have developed a plan to achieve this in stages.

BSW_OUTCOMES

Whether the participant had cancer discovered during the colonoscopy procedure

CANCER

Date of participant’s attended colonoscopy or flexi-sig procedure

COLON_DATE

The outcome from the colonoscopy procedure (planned management)

OUTCOME

Whether the participant had polyps detected (not necessarily removed) during the colonoscopy procedure

POLYPS

Age of participant at time of the authorised positive kit result

AGE_POS

Contails details of all bowel screening tests received back from participants. Tests are performed using either FOB kit or FIT kit. Data available from the end of October 2008 onwards. NOTE - response rate by region/LSOA varies, despite all men and women aged 60 to 74 who are registered with a GP in England and Wales are automatically sent a bowel cancer screening kit every 2 years.

BSW_TESTS

Age of participant at time when test kit was sent. NOTE - Evidence does not support population screening for those aged over 74. Bowel Screening Wales does not facilitate for individuals to opt into the programme beyond the age of 74 years. Once the programme has fully optimised NHS hope to work with Welsh Government to allow for opt-ins. For this reason age-value cannot go above age=99 due to table design. All men and women aged 60 to 74 who are registered with a GP in England and Wales are automatically sent a bowel cancer screening kit every 2 years.

AGE_SENT

Date test kit was received by Bowel Screening Wales.

RECEIVED_TS

Result of bowel screening test. N = Negative; E = Equivocal [FIT kit normally sent]; P = Positive; S = Spoilt [Laboratory could not test kit and issue a result - another kit is sent out in this circumstance/outcome].

Bowel Screening Wales (SBSW)

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