Journal of the Royal Society of Medicine
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Review Comparative Study
Statistical analyses in Swedish randomised trials on mammography screening and in other randomised trials on cancer screening: a systematic review.
We compared calculations of relative risks of cancer death in Swedish mammography trials and in other cancer screening trials. ⋯ The use of unconventional statistical methods in Swedish trials has led to overestimation of risk reduction in breast cancer death attributable to mammography screening. The constant risk reduction observed in screening groups was probably due to the trial design that optimised awareness and medical management of women allocated to screening groups.
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Review Comparative Study
Statistical analyses in Swedish randomised trials on mammography screening and in other randomised trials on cancer screening: a systematic review.
We compared calculations of relative risks of cancer death in Swedish mammography trials and in other cancer screening trials. ⋯ The use of unconventional statistical methods in Swedish trials has led to overestimation of risk reduction in breast cancer death attributable to mammography screening. The constant risk reduction observed in screening groups was probably due to the trial design that optimised awareness and medical management of women allocated to screening groups.