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Table 2 Summary of meta-analysis findings for red and processed meat intake and prostate cancer.

From: A review and meta-analysis of prospective studies of red and processed meat intake and prostate cancer

Model # Studies SRRE (95% CI) P-Heterogeneity
Red Meat    
Total model (includes individual red meat items) 15 1.00 (0.96-1.05) 0.264
Red meat specific variable only ("red meat" as a food group) 11 0.98 (0.93-1.04) 0.353
Studies published during 2000-2009 10 0.99 (0.95-1.03) 0.593
Studies published prior to 2000 5 1.13 (0.92-1.37) 0.108
Studies that adjusted for at least three of the following factors: energy, smoking, family history of cancer, age, race 9 0.99 (0.95-1.03) 0.536
Le Marchand removed (13 food item questionnaire) 13 0.99 (0.95-1.03) 0.401
Gann removed (outlier study) 13 0.99 (0.95-1.04) 0.364
Advanced prostate cancer 8 1.01 (0.94-1.09) 0.657
100 g increment (total prostate cancer)* 9 1.00 (0.95-1.05) 0.007
100 g increment (advanced cancer)* 5 0.97 (0.91-1.02) 0.571
Processed Meat
Total model 11 1.05 (0.99-1.12) 0.088
Michaud removed (data for metastatic prostate cancer only) 10 1.04 (0.98-1.11) 0.113
Studies published during 2000-2009 [Note: these are also the studies that adjusted for at least three of the following factors: energy, smoking, family history of cancer, age, race] 8 1.04 (0.97-1.11) 0.085
Studies published prior to 2000 [Note: these studies did not simultaneously adjust for three of the above factors] 3 1.25 (1.00-1.54) 0.705
Advanced prostate cancer 8 1.10 (0.95-1.27) 0.032
30 g increment (total prostate cancer) 10 1.02 (1.00-1.04) 0.274
30 g increment (advanced cancer) 6 1.01 (0.90-1.14) 0.020
  1. *Includes studies that reported data for a "red meat" group variable