Accuracy of Screening Tests

The prevalent methods of breast cancer screening are mam-mography, clinical breast examination (CBE), and self breast examination (SBE), or breast self-examination (BSE). The sensitivity of mammography ranges from 77% to 95% for cancers diagnosed over the following year, and specificity ranges from 94% to 97%. Sensitivity is lower in women younger than age 50 and in women taking hormone replacement because of increased breast tissue density. Specificity increases with shorter screening intervals and availability of prior mammograms. Adequate evidence suggests that teaching BSE does not reduce breast cancer mortality. The evidence for additional effects of CBE independent of mammography on breast cancer mortality is inadequate. The sensitivity of CBE ranges from 40% to 69% and specificity from 86% to 99% (Humphrey et al., 2002).

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Curing Eczema Naturally

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