CKD-EPI and cockcroft-gault equations identify similar candidates for neoadjuvant chemotherapy in muscle-invasive bladder cancer

PLoS One. 2014 Apr 10;9(4):e94471. doi: 10.1371/journal.pone.0094471. eCollection 2014.

Abstract

Clinical guidelines suggest neoadjuvant cisplatin-based chemotherapy prior to cystectomy in the setting of muscle-invasive bladder cancer (MIBC). A creatinine clearance (CrCl) >60 mL/min is frequently used to characterize cisplatin-eligible patients, and use of the CKD-EPI equation to estimate CrCl has been advocated. From a prospectively maintained institutional database, patients with MIBC who received cystectomy were identified and clinicopathologic information was ascertained. CrCl prior to surgery was computed using three equations: (1) Cockcroft-Gault (CG), (2) CKD-EPI, and (3) MDRD. The primary objective was to determine if the CG and CKD-EPI equations identified a different proportion of patients who were cisplatin-eligible, based on an estimated CrCl of >60 mL/min. Cisplatin-eligibility was also assessed in subsets based on age, CCI score and race. Actuarial rates of neoadjuvant cisplatin-based chemotherapy use were also reported. Of 126 patients, 70% and 71% of patients were found to be cisplatin-eligible by the CKD-EPI and CG equations, respectively (P = 0.9). The MDRD did not result in significantly different characterization of cisplatin-eligibility as compared to the CKD-EPI and CG equations. In the subset of patients age >80, the CKD-EPI equation identified a much smaller proportion of cisplatin-eligible patients (25%) as compared to the CG equation (50%) or the MDRD equation (63%). Only 34 patients (27%) received neoadjuvant cisplatin-based chemotherapy. Of the 92 patients who did not receive neoadjuvant chemotherapy, 64% had a CrCl >60 mL/min by CG. In contrast to previous reports, the CKD-EPI equation does not appear to characterize a broader span of patients as cisplatin-eligible. Older patients (age >80) may less frequently be characterized as cisplatin-eligible by CKD-EPI. The discordance between actual rates of neoadjuvant chemotherapy use and rates of cisplatin eligibility suggest that other factors (e.g., patient and physician preference) may guide clinical decision-making.

Publication types

  • Research Support, N.I.H., Extramural

MeSH terms

  • Age Factors
  • Aged
  • Aged, 80 and over
  • Antineoplastic Agents / therapeutic use*
  • Cisplatin / therapeutic use*
  • Creatinine / blood
  • Cystectomy
  • Decision Making, Computer-Assisted*
  • Female
  • Glomerular Filtration Rate
  • Humans
  • Male
  • Middle Aged
  • Muscle Neoplasms / drug therapy*
  • Muscle Neoplasms / secondary
  • Muscle Neoplasms / surgery
  • Neoadjuvant Therapy / statistics & numerical data*
  • Patient Selection
  • Practice Guidelines as Topic
  • Urinary Bladder / drug effects
  • Urinary Bladder / pathology
  • Urinary Bladder / surgery
  • Urinary Bladder Neoplasms / drug therapy*
  • Urinary Bladder Neoplasms / pathology
  • Urinary Bladder Neoplasms / surgery

Substances

  • Antineoplastic Agents
  • Creatinine
  • Cisplatin