King Grub
2012-03-27, 09:47
To provide a quantitative assessment of the association between excess body weight (EBW) and the risk of primary liver cancer (PLC), we performed an updated meta-analysis of prospective observational studies.
METHODS:
We searched PUBMED and EMBASE for studies of body mass index and the risk of PLC published through 15 th September 2011. Summary relative risks (SRRs) with their corresponding 95% confidence intervals (CIs) were calculated using a random-effects model. The meta-regression and stratified methods were used to examine heterogeneity across studies.
RESULTS:
A total of 26 prospective studies, including 25,337 PLC cases, were included in this analysis. Overall, excess body weight (EBW: body mass index (BMI)⩾25kg/m(2)) and obesity (BMI⩾30kg/m(2)) were associated with an increased risk of PLC, with significant heterogeneity (EBW: SRRs 1.48, 95%CIs 1.31-1.67, P(h)<0.001, I(2)=83.6%; Obesity: SRRs 1.83, 95%CIs 1.59-2.11, P(h)<0.001, I(2)=75.0%). Subgroup analyses revealed that the positive associations were independent of geographic locations, alcohol consumption, history of diabetes or infections with hepatitis B (HBV) and/or hepatitis C virus (HCV). Obese males had a higher risk of PLC than obese females did (P=0.027). A stronger risk of PLC with EBW was observed for patients with HCV (but not HBV) infection or cirrhosis compared with the general population.
CONCLUSIONS:
Findings from this meta-analysis strongly support that EBW or obesity is associated with an increased risk of PLC in both males and females.
Eur J Cancer. 2012 Mar 23. Excess body weight and the risk of primary liver cancer: An updated meta-analysis of prospective studies.
METHODS:
We searched PUBMED and EMBASE for studies of body mass index and the risk of PLC published through 15 th September 2011. Summary relative risks (SRRs) with their corresponding 95% confidence intervals (CIs) were calculated using a random-effects model. The meta-regression and stratified methods were used to examine heterogeneity across studies.
RESULTS:
A total of 26 prospective studies, including 25,337 PLC cases, were included in this analysis. Overall, excess body weight (EBW: body mass index (BMI)⩾25kg/m(2)) and obesity (BMI⩾30kg/m(2)) were associated with an increased risk of PLC, with significant heterogeneity (EBW: SRRs 1.48, 95%CIs 1.31-1.67, P(h)<0.001, I(2)=83.6%; Obesity: SRRs 1.83, 95%CIs 1.59-2.11, P(h)<0.001, I(2)=75.0%). Subgroup analyses revealed that the positive associations were independent of geographic locations, alcohol consumption, history of diabetes or infections with hepatitis B (HBV) and/or hepatitis C virus (HCV). Obese males had a higher risk of PLC than obese females did (P=0.027). A stronger risk of PLC with EBW was observed for patients with HCV (but not HBV) infection or cirrhosis compared with the general population.
CONCLUSIONS:
Findings from this meta-analysis strongly support that EBW or obesity is associated with an increased risk of PLC in both males and females.
Eur J Cancer. 2012 Mar 23. Excess body weight and the risk of primary liver cancer: An updated meta-analysis of prospective studies.