Figure 1
From: A pooled analysis of 10 case–control studies of melanoma and oral contraceptive use
Study specific and pooled odds ratios (95% confidence intervals) for melanoma in women in relation to use of oral contraceptives. User of oral contraceptives defined as 1 or more years of oral contraceptive use and non-user as never use or less than one year of use. The individual study odds ratios are shown as a solid box and the pooled estimate as an open diamond. The size of the box is inversely proportional to the standard deviation for the odds ratio. Lines show the 95% confidence intervals.
