Figure 1.

Meta-analysis of the association between birth weight (five categories) and risk for breast cancer. The tests for homogeneity and for publication bias in the studies analyzed are as follows. Category I (birth weight <2,500 g) versus reference: Q = 9.66 (8 degrees of freedom), P = 0.29; Begg test, P = 0.75; Egger test, P = 0.66. Category II (2,500 to 2,999 g) is the reference. Category III (3,000 to 3,499 g) versus reference: Q = 6.53 (8 degrees of freedom), P = 0.59; Begg test, P = 0.25; Egger test, P = 0.46. Category IV (3,500 to 3,999 g) versus reference: Q = 4.17 (8 degrees of freedom), P = 0.84; Begg test, P = 0.60; Egger test, P = 0.93. Category V (≥4,000 g) versus reference: Q = 11.18 (8 degrees of freedom), P = 0.19; Begg test, P = 0.25; Egger test, P = 0.30. 1We used adjusted odds ratios (ORs) for meta-analysis because the numbers of cases and controls were not represented in the original article. CI, confidence interval.

Park et al. Breast Cancer Research 2008 10:R8   doi:10.1186/bcr1850
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