Coded tumor size may be unreliable for small metastatic renal cancers in the Surveillance, Epidemiology, and End Results dataset

Urology
Mike M Nguyen, Inderbir S Gill

Abstract

To report a weakness in the April 2006 release of the Surveillance, Epidemiology, and End Results (SEER) dataset, in which the primary tumor size of small (< 1.8 cm) metastatic renal cancers was often incorrectly coded into the dataset from the measurement as listed in the patient's chart. In the SEER dataset, 167 patients with tumor size < or = 2.5 cm had metastatic disease at presentation in 1998-2003. Each patient's chart was individually re-examined by SEER registries to determine the correct primary tumor size. This confirmed data were compared with the coded tumor size in the SEER dataset. Of the 167 re-examined cases, 2 had incorrect histology and 6 could not be verified. Of the remaining 159 cases, 87 (55%) were correctly coded for primary tumor size while 72 (45%) were incorrect. The error rate decreased with increasing size; for tumors < or = 1 cm, > 1-2 cm, and > 2-2.5 cm, error rates were 88%, 53%, and 6.8%, respectively (P < .001). A breakpoint in error rate occurred between tumor sizes < 1.8 cm (78%) and > or = 1.8 cm (10%) (P < .001). Most errors (72%) were miscoded by a factor of 10. Analysis of the latest April 2009 release suggests that most corrections have been incorporated into the public access dataset. Co...Continue Reading

References

Jun 14, 2003·Journal of Clinical Oncology : Official Journal of the American Society of Clinical Oncology·Linda C Harlan, Benjamin F Hankey
Nov 8, 2007·Annals of Surgical Oncology·Hari Nathan, Timothy M Pawlik
Jan 20, 2009·The Journal of Urology·Mike M Nguyen, Inderbir S Gill

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Citations

May 28, 2014·Clinical Genitourinary Cancer·Brandon A MahalPaul L Nguyen
Feb 9, 2016·Diseases of the Colon and Rectum·Vinayak MuralidharJennifer Y Wo
Jun 26, 2013·Journal of the American College of Surgeons·Michael E EggerGlenda G Callender
Jul 26, 2011·European Urology·Eric C Umbreit, R Houston Thompson
Mar 25, 2020·International Journal of Urology : Official Journal of the Japanese Urological Association·Yu Guang TanAllen Soon Phang Sim

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