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Cigarette Smoking and Gastric Cancer in the Stomach Cancer Pooling (Stop) Project Publisher Pubmed



Praud D1 ; Rota M2 ; Pelucchi C2 ; Bertuccio P1 ; Rosso T1 ; Galeone C2 ; Zhang ZF5 ; Matsuo K11 ; Ito H12 ; Hu J13 ; Johnson KC15 ; Yu GP14 ; Palli D3 ; Ferraroni M1 Show All Authors
Authors
  1. Praud D1
  2. Rota M2
  3. Pelucchi C2
  4. Bertuccio P1
  5. Rosso T1
  6. Galeone C2
  7. Zhang ZF5
  8. Matsuo K11
  9. Ito H12
  10. Hu J13
  11. Johnson KC15
  12. Yu GP14
  13. Palli D3
  14. Ferraroni M1
  15. Muscat J9
  16. Lunet N17, 18
  17. Peleteiro B17, 18
  18. Malekzadeh R19
  19. Ye W20
  20. Song H20
  21. Zaridze D22
  22. Maximovitch D22
  23. Aragones N23, 24, 25
  24. Castanovinyals G26, 27, 28
  25. Vioque J26, 29
  26. Navarretemunoz EM26, 29
  27. Pakseresht M16, 19, 31
  28. Pourfarzi F19, 30
  29. Wolk A21
  30. Orsini N21
  31. Bellavia A21
  32. Hakansson N21
  33. Mu L7
  34. Pastorino R4
  35. Kurtz RC8
  36. Derakhshan MH19, 32
  37. Lagiou A33
  38. Lagiou P10, 34
  39. Boffetta P9
  40. Boccia S4, 6, 35
  41. Negri E2
  42. La Vecchia C1

Source: European Journal of Cancer Prevention Published:2018


Abstract

Tobacco smoking is a known cause of gastric cancer, but several aspects of the association remain imprecisely quantified. We examined the relation between cigarette smoking and the risk of gastric cancer using a uniquely large dataset of 23 epidemiological studies within the 'Stomach cancer Pooling (StoP) Project', including 10 290 cases and 26 145 controls. We estimated summary odds ratios (ORs) and the corresponding 95% confidence intervals (CIs) by pooling study-specific ORs using random-effects models. Compared with never smokers, the ORs were 1.20 (95% CI: 1.09-1.32) for ever, 1.12 (95% CI: 0.99-1.27) for former, and 1.25 (95% CI: 1.11-1.40) for current cigarette smokers. Among current smokers, the risk increased with number of cigarettes per day to reach an OR of 1.32 (95% CI: 1.10-1.58) for smokers of more than 20 cigarettes per day. The risk increased with duration of smoking, to reach an OR of 1.33 (95% CI: 1.14-1.54) for more than 40 years of smoking and decreased with increasing time since stopping cigarette smoking (P for trend<0.01) and became similar to that of never smokers 10 years after stopping. Risks were somewhat higher for cardia than noncardia gastric cancer. Risks were similar when considering only studies with information on Helicobacter pylori infection and comparing all cases to H. pylori+ controls only. This study provides the most precise estimate of the detrimental effect of cigarette smoking on the risk of gastric cancer on the basis of individual data, including the relationship with dose and duration, and the decrease in risk following stopping smoking. © 2018 Wolters Kluwer Health, Inc. All rights reserved.
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