National Bowel Cancer Audit: Short Report – Cancer registry data

Reports | Published: 11 Jun 2020

Initial linkage between cancer registration data provided by the National Cancer Registration and Analysis Service (NCRAS) and the National Bowel Cancer Audit (NBOCA) data for patients in England published in the 2019 Annual Report indicated there was a difference in the number and type of patients captured by the data sources. This report aims to understand the reasons for the differences in cases captured in the two datasets and to determine whether NCRAS data can be routinely linked to audit data to improve case ascertainment in audit reporting.

The objectives of the report are to:

(i) investigate how much allowing linkage to patients with a broader range of diagnosis dates improves the linkage rate

(ii) assess the quality of the linkage of the two datasets by carrying out clerical linkage of the unlinked cases, and quantifying the extent of national data opt-out

(iii) identify which patient groups are under-captured in NBOCA

(iv) assess the data completeness of key data items in NCRAS records not linked to NBOCA

(v) assess the distribution of missing patients across hospital trusts.

The entire short report can be viewed by clicking on the link below. Please note you will be prompted to register your details so you can receive updates. You may skip the registration process if you prefer.

Don’t miss out. Sign up to be notified when this resource is updated and to receive updates about other related quality improvement resources, events and news from HQIP. Or you can  .


By continuing you agree to receive emails with updates and other information from HQIP and you are confirming you are over the age of 13.

Please read our privacy policy to understand how HQIP uses the information you provide, your use of HQIP’s website and your interaction with the marketing emails to improve the relevance of the communications we send you. You can unsubscribe at any time.

I have read and agree with the contents of the privacy policy.

National Bowel Cancer Audit: Short Report – Cancer registry data