Table 2

Summary of meta-analysis findings for 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

*Includes studies that reported data for a "red meat" group variable

Alexander et al. Nutrition Journal 2010 9:50   doi:10.1186/1475-2891-9-50