Impact of tobacco smoking on the risk of developing 25 different cancers in the UK: a retrospective study of 422,010 patients followed for up to 30 years

Louis Jacob; Moritz Freyn; Matthias Kalder; Konstantinos Dinas; Karel Kostev

doi:10.18632/oncotarget.24724

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Research Papers:

Impact of tobacco smoking on the risk of developing 25 different cancers in the UK: a retrospective study of 422,010 patients followed for up to 30 years

Louis Jacob, Moritz Freyn, Matthias Kalder, Konstantinos Dinas and Karel Kostev _

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Oncotarget. 2018; 9:17420-17429. https://doi.org/10.18632/oncotarget.24724

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Abstract

Louis Jacob1, Moritz Freyn2, Matthias Kalder2, Konstantinos Dinas3 and Karel Kostev4

1Faculty of Medicine, University of Paris 5, Paris, France

2University Clinic, Philipps University of Marburg, Marburg, Germany

3Faculty of Medicine, Aristotle University of Thessaloniki, Thessaloníki, Greece

4Epidemiology Research, IQVIA, Frankfurt, Germany

Correspondence to:

Karel Kostev, email: [email protected]

Keywords: tobacco smoking; cancer; risk factor; general practices; the UK

Received: February 14, 2018 Accepted: February 26, 2018 Published: April 03, 2018

ABSTRACT

Background: The aim of this study was to analyze the impact of tobacco smoking on the risk of developing 25 different cancers in patients followed for up to 30 years in general practices in the UK.

Methods: This study included all individuals with at least one visit to one of 196 general practitioners’ offices in the UK between January 1988 and December 2008 (index date). Only individuals with documented smoking status were included. Smokers and non-smokers were matched (1:1) by age, gender, index year, body mass index, and physician. The main outcome of the study was the risk of cancer as a function of smoking status. Data regarding a total of 25 cancers were available for the present analysis. The risk of cancer was analyzed using Cox’s regression model.

Results: The present retrospective study included 211,005 smokers and 211,005 non-smokers. The mean age was 36.5 years (SD = 12.5 years) in men and 34.3 years (SD = 13.1 years) in women. There was a slightly positive association between smoking and any cancer in both men (HR = 1.07) and women (HR = 1.03). Smoking was further found to be positively associated with several cancers, such as liver cancer, bladder and kidney cancers, pancreas cancer, and lymphoma. By contrast, the use of tobacco was negatively associated with the risk of developing skin cancer, prostate cancer, multiple myeloma, endometrial carcinoma, or breast cancer.

Conclusions: Smoking increased the overall risk of cancer in primary care practices in the UK. In addition, smoking was predominantly positively and less frequently negatively associated with numerous specific cancers.

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Research Papers:

Impact of tobacco smoking on the risk of developing 25 different cancers in the UK: a retrospective study of 422,010 patients followed for up to 30 years

Abstract