highly significantP < 0.001
This, however, conceals a highly significant heterogeneity of the effect between centres ( P < 0.001).
This, however, conceals a highly significant heterogeneity of the effect between centres ( P < 0.001).
Where only the mediolateral oblique (MLO) view was available, there was a modest, borderline significant ( P = 0.05) effect of breast density on risk, with an OR for the highest category relative to the lowest of 1.88 (95% CI = 0.80 to 4.45).