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17 mei 2012:  Bron: Am J Med 2012.

Mensen die regelmatig vis eten zouden daarmee het risico op ontwikkelen van darmkanker en vooral endeldarmkanker - rectumkanker verkleinen. Aldus de resultaten uit een meta analyse van 41 cohortstudies en case control studies in de periode van 1990 tot 2011. De studie is uitgevoerd door onderzoekers van de University of Medicine and Dentistry of New Jersey-Robert Wood Johnson Medical School.
De onderzoekers tekenen er wel bij aan dat niet duidelijk is of mensen die reeds regelmatig vis eten nog wel gebaat zouden zijn met nog meer vis eten. Verder heeft de studie alleen het effect onderzocht van het eten van verse vis en niet van visolie capsules bv. Ook is onduidelijk of een bepaalde leefstijl en andere gezonde gewoontes invloed hebben op het voordeel van vis eten. Uit de studie komt wel naar voren dat wie veel rood vlees of bewerkt vlees eet het ontwikkelen van kanker kan bevorderen. Maar dat is al heel lang duidelijk, zie onder rood vlees schadelijk voor gezondheid. Wie dus gewend is veel rood vlees te eten kan met een vermindering daarvan en regelmatig, zeg twee keer per week, een verse vis daarvoor in de plaats neemt, de kans op ontwikkelen van darmkanker echt verminderen. Die vis moet dan niet op de barbeque of grill gebakken worden want dan schijnt het effect te niet gedaan te worden, aldus de onderzoekers.

In de studie wordt gecorrigeerd naar leeftijd, alcohol, erfelijkheid en andere risico factoren een significant verschil van 12% gevonden voor het risico op het ontwikkelen van alle vormen van darmkanker. Uitgesplitst naar hoogste en laagste gebruik van verse vis blijkt voor dikke darmkanker het verschil 4%, voor rectumkanker - endeldarmkanker blijkt dat verschil 21% te zijn.
De onderzoekers vermoeden dat de Omega-3 vetzuren  hiervoor verantwoordelijk kunnen zijn, maar zeggen er wel bij dat hun studiegegevens dit niet bewijzen. ook bewijst de studie niet dat visolie capsules hetzelfde effect zouden hebben dan het eten van verse vis, dat was geen studiedoel van deze meta analyse. Wie in de artikeln in linkerkolom klikt ziet dat ook visolie capsules wel degelijk een groot effect hebben op onze gezondheid. Klik hier voor recepten met verse vis

Als u hier klikt kunt U het volledige studierapport tegen betaling inzien. Hier het abstract van de studie. Onderaan 89 referenties van studies gerelateerd aan deze meta analyse

Meta-analysis suggest that fish consumption is inversely associated with colorectal cancer

Fish Consumption and Colorectal Cancer Risk in Humans: A Systematic Review and Meta-analysis

  • Shengjun Wu

      Affiliations

    • Department of Psychology, Fourth Military Medical University, Xi'an, China
    • SW, BF and KL contributed equally to this article.
  • ,
  • Bin Feng

      Affiliations

    • State Key Laboratory of Cancer Biology and Xijing Hospital of Digestive Diseases, Fourth Military Medical University, Xi'an, China
    • SW, BF and KL contributed equally to this article.
  • ,
  • Kai Li

      Affiliations

    • State Key Laboratory of Cancer Biology and Xijing Hospital of Digestive Diseases, Fourth Military Medical University, Xi'an, China
  • ,
  • Xia Zhu

      Affiliations

    • Department of Psychology, Fourth Military Medical University, Xi'an, China
  • ,
  • Shuhui Liang

      Affiliations

    • State Key Laboratory of Cancer Biology and Xijing Hospital of Digestive Diseases, Fourth Military Medical University, Xi'an, China
  • ,
  • Xufeng Liu

      Affiliations

    • Department of Psychology, Fourth Military Medical University, Xi'an, China
  • ,
  • Shuang Han

      Affiliations

    • State Key Laboratory of Cancer Biology and Xijing Hospital of Digestive Diseases, Fourth Military Medical University, Xi'an, China
  • ,
  • Biaoluo Wang

      Affiliations

    • State Key Laboratory of Cancer Biology and Xijing Hospital of Digestive Diseases, Fourth Military Medical University, Xi'an, China
  • ,
  • Kaichun Wu

      Affiliations

    • State Key Laboratory of Cancer Biology and Xijing Hospital of Digestive Diseases, Fourth Military Medical University, Xi'an, China
  • ,
  • Danmin Miao

      Affiliations

    • Department of Psychology, Fourth Military Medical University, Xi'an, China
  • ,
  • Jie Liang

      Affiliations

    • State Key Laboratory of Cancer Biology and Xijing Hospital of Digestive Diseases, Fourth Military Medical University, Xi'an, China
    • SW, BF and KL contributed equally to this article.
  • ,
  • Daiming Fan

      Affiliations

    • State Key Laboratory of Cancer Biology and Xijing Hospital of Digestive Diseases, Fourth Military Medical University, Xi'an, China
    • Corresponding Author InformationRequests for reprints should be addressed to Jie Liang or Daiming Fan, 127 West Chang-Le Road, Xi'an, Shaanxi, 710032, China

published online 18 April 2012.
Corrected Proof

Abstract 

Background

Fish consumption may protect against colorectal cancer, but results from observational studies are inconsistent; therefore, a systematic review with a meta-analysis was conducted.

Methods

Relevant studies were identified by a search of MEDLINE and EMBASE databases to May 2011, with no restrictions. Reference lists from retrieved articles also were reviewed. Studies that reported odds ratio (OR) or relative risk estimates with 95% confidence intervals (CIs) for the association between the consumption of fish and the risk of colorectal, colon, or rectal cancer were included. Two authors independently extracted data and assessed study quality. The risk estimate (hazard ratio, relative risk, or OR) of the highest and lowest reported categories of fish intake were extracted from each study and analyzed using a random-effects model.

Results

Twenty-two prospective cohort and 19 case-control studies on fish consumption and colorectal cancer risk met the inclusion criteria and were included in the meta-analysis. Our analysis found that fish consumption decreased the risk of colorectal cancer by 12% (summary OR, 0.88; 95% CI, 0.80-0.95). The pooled ORs of colorectal cancer for the highest versus lowest fish consumption in case-control studies and cohort studies were 0.83 (95% CI, 0.72-0.95) and 0.93 (95% CI, 0.86-1.01), respectively. There was heterogeneity among case-control studies (P<.001) but not among cohort studies. A significant inverse association was found between fish intake and rectal cancer (summary OR, 0.79; 95% CI, 0.65-0.97), and there was a modest trend seen between fish consumption and colon cancer (summary OR, 0.96; 95% CI, 0.81-1.14). This study had no publication bias.

Conclusion

Our findings from this meta-analysis suggest that fish consumption is inversely associated with colorectal cancer.

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