Meta-analysis of the association between birth weight (two categories) and risk for breast cancer. The tests for homogeneity and for publication bias in the studies analyzed are as folows. Reference (<3,000 g [or ≤3,000 g]) versus ≥3,000 g (or >3,000 g): Q = 11.57 (15 degrees of freedom), P = 0.93; Begg test, P = 0.15; Egger test, P = 0.50. CI, confidence interval; OR, odds ratio.
Park et al. Breast Cancer Research 2008 10:R8 doi:10.1186/bcr1850