Faculty Collaboration Database

Smoking status, usual adult occupation, and risk of recurrent urothelial bladder carcinoma: data from The Cancer Genome Atlas (TCGA) Project. Cancer Causes Control 2016 Dec;27(12):1429-1435

Date

11/03/2016

Pubmed ID

27804056

Pubmed Central ID

PMC5114667

DOI

10.1007/s10552-016-0821-7

Scopus ID

2-s2.0-84994130867 (requires institutional sign-in at Scopus site)   17 Citations

Abstract

PURPOSE: Tobacco smoking and occupational exposures are the leading risk factors for developing urothelial bladder carcinoma (UBC), yet little is known about the contribution of these two factors to risk of UBC recurrence. We evaluated whether smoking status and usual adult occupation are associated with time to UBC recurrence for 406 patients with muscle-invasive bladder cancer submitted to The Cancer Genome Atlas (TCGA) project.

METHODS: Kaplan-Meier and Cox proportional hazard methods were used to assess the association between smoking status, employment in a high-risk occupation for bladder cancer, occupational diesel exhaust exposure, and 2010 Standard Occupational Classification group and time to UBC recurrence.

RESULTS: Data on time to recurrence were available for 358 patients over a median follow-up time of 15 months. Of these, 133 (37.2%) experienced a recurrence. Current smokers who smoked for more than 40 pack-years had an increased risk of recurrence compared to never smokers (HR 2.1, 95% CI 1.1, 4.1). Additionally, employment in a high-risk occupation was associated with a shorter time to recurrence (log-rank p = 0.005). We found an increased risk of recurrence for those employed in occupations with probable diesel exhaust exposure (HR 1.8, 95% CI 1.1, 3.0) and for those employed in production occupations (HR 2.0, 95% CI 1.1, 3.6).

CONCLUSIONS: These findings suggest smoking status impacts risk of UBC recurrence, although several previous studies provided equivocal evidence regarding this association. In addition to the known causal relationship between occupational exposure and bladder cancer risk, our study suggests that occupation may also be related to increased risk of recurrence.

Author List

Wilcox AN, Silverman DT, Friesen MC, Locke SJ, Russ DE, Hyun N, Colt JS, Figueroa JD, Rothman N, Moore LE, Koutros S

MESH terms used to index this publication - Major topics in bold

Aged
Female
Humans
Male
Middle Aged
Neoplasm Recurrence, Local
Occupational Exposure
Occupations
Risk Factors
Smoking
United States
Urinary Bladder Neoplasms