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Serum leptin, C-reactive protein, and cancer mortality in the NHANES III.

Authors
  • Wulaningsih, Wahyu1
  • Holmberg, Lars2, 3
  • Ng, Tony4
  • Rohrmann, Sabine5
  • Van Hemelrijck, Mieke1
  • 1 Cancer Epidemiology Group, Division of Cancer Studies, School of Medicine, King's College London, London, United Kingdom. , (United Kingdom)
  • 2 Department of Surgical Sciences, Uppsala University, Uppsala, Sweden. , (Sweden)
  • 3 Regional Cancer Centre, Uppsala University, Uppsala, Sweden. , (Sweden)
  • 4 Randall Division and Division of Cancer Studies, Richard Dimbleby Department of Cancer Research, School of Medicine, King's College London, London, United Kingdom. , (United Kingdom)
  • 5 Division of Chronic Disease Epidemiology, Epidemiology, Biostatistics and Prevention Institute, University of Zurich, Zurich, Switzerland. , (Switzerland)
Type
Published Article
Journal
Cancer Medicine
Publisher
Wiley
Publication Date
Jan 01, 2016
Volume
5
Issue
1
Pages
120–128
Identifiers
DOI: 10.1002/cam4.570
PMID: 26632325
Source
Medline
Keywords
Language
English
License
Unknown

Abstract

Adipokines, such as leptin, may affect cancer through its link with inflammation and obesity. We investigated the association between leptin, C-reactive protein, and risk of cancer death while accounting general and abdominal obesity. From the Third National Health and Examination Survey (NHANES III), we selected 5957 adult men and women with baseline measurements of serum leptin and CRP. Multivariable Cox regression was used to assess leptin and CRP levels (low, moderate, high) in relation to risk of cancer death. Stratification analyses were performed for obesity as defined by body mass index (BMI) and waist circumference. Fine and Gray regression was performed to account for death from cardiovascular disease and other causes as competing events. A total of 385 participants died of cancer during a mean follow-up of 18 years. After adjusting for BMI and waist circumference, an inverse association with log-transformed leptin was found for women, with a hazard ratio (HR) of 0.81 (95% confidence interval [CI]: 0.51-1.30) and 0.40 (95% CI: 0.24-0.68) for moderate and high compared to low levels of leptin, respectively; P(trend) = 0.0007). No association for leptin was observed in men, but higher CRP corresponded to increased risk of dying from cancer (HR: 2.98; 95% CI: 1.57-5.64 for the highest vs. lowest categories of CRP). Similar associations were observed with competing risk analysis also adjusted for BMI and waist circumference. Contrasting associations of serum leptin and CRP with cancer mortality may indicate sex-specific biological or environmental pathways linking obesity and cancer in men and women which warrant mechanistic investigations. © 2015 The Authors. Cancer Medicine published by John Wiley & Sons Ltd.

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