Funnel plot of study-specific and summary OR and 95% CI for the association between alcohol intake (none, any) and ovarian carcinoma in 12 OCAC studies. Squares indicate study-specific OR; the size of the squares is proportional to study-specific sample size; the width of lines indicates the study-specific 95% CI; diamonds indicate summary OR; the width of the diamonds indicates summary 95% CI. Refer to Table 1 for study nomenclature. 1A: Age and race adjusted OR and 95% CI. Statistical heterogeneity in ORs across studies, P value < 0.0001 (see Statistical analysis). 1B: Multivariable-adjusted OR and 95% CI. Adjusted for variables in footnote of Table 2. Statistical heterogeneity in ORs across studies, P value = 0.03.
Kelemen et al. BMC Cancer 2013 13:28 doi:10.1186/1471-2407-13-28