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Table 2 Identification of TACT-reported disease-free survival events in NCDR

From: Can routine data be used to support cancer clinical trials? A historical baseline on which to build: retrospective linkage of data from the TACT (CRUK 01/001) breast cancer trial and the National Cancer Data Repository

  Local recurrence Distant recurrence New breast disease
(N = 140) (N = 691) (N = 67)
Agreementa 98 (71.0%) 425 (63.5%) 54 (81.8%)
Event reported in TACT but not in NCDR 17 76 2
Disagreement in number of sites and/or diagnosis time 23 168 10
Event occurred after 31 March 2010 (HES extract date) 2 22 1
  1. aDenominator excludes events occurring after 31 March 2010 (HES extract date). TACT Taxotere and Adjuvant ChemoTherapy, NCDR National Cancer Data Repository, HES Hospital Episode Statistics