SCDI breakdown by Cancer Alliance, 2014-2015

This website presents the secondary care diagnostic interval (in days) for patients diagnosed in England in 2014-2015 recorded as having a relevant first event (or start point) in the 6 months leading up to diagnosis.

The SCDI is defined as the time in days between a patient's first event with secondary care and their diagnosis date. The first event is derived from one of the following event types:

  • referral onto an urgent suspected cancer pathway
  • referral to secondary care appointment
  • secondary care appointment
  • relevant diagnostic test appointment in secondary care
The earliest occurring of these events in the 6 months immediately preceding diagnosis is selected as the first event.


This tool does not aim to determine an optimal interval length and it is important to note that a shorter interval is not necessarily better.

For further information on the SCDI and caveats around the data please refer to the 'Information' tab. The full methodology is described in the standard operating procedure: CAS-SOP: Defining the Secondary Care Diagnostic Interval using AV_Tumour linked data.

The results are presented for each cancer site by Cancer Alliance.


Analytical notes:

  • SCDI has been calculated for 25 cancer sites
  • All results are unadjusted


Click below to download a copy of the data and graphs:
Download data for this cancer type
Download boxplot graph for this cancer type and Cancer Alliance
Download median plot of confidence intervals for this cancer type and Cancer Alliance

This work has been produced as part of the Cancer Research UK - Public Health England Partnership.
This work was undertaken as part of the CRUK-PHE partnership. Data for this study is based on patient-level information collected by the NHS, as part of the care and support of cancer patients. The data is collated, maintained and quality assured by the National Cancer Registration and Analysis Service, which is part of Public Health England.