By 1998 the NHS breast screening programme had directly produced a reduction in annual mortality from breast cancer of 6-7% in women aged 55-69, although the sensitivity analysis indicated a probable range of 5-12%.ubjects: Women aged 40 to 79 years. Results: Compared with predicted mortality in the absence of screening or other effects the total reduction in mortality from breast cancer in 1998 in women aged 55-69 was estimated as 21.3%.
In the field of mathematical optimization, stochastic programming is a framework for modeling optimization problems that involve uncertainty. Whereas deterministic optimization problems are formulated with known parameters, real world problems almost invariably include some unknown parameters.
Sequences are database objects from which multiple users can generate unique integers. The sequence generator generates sequential numbers, which can help to generate unique primary keys automatically, and to coordinate keys across multiple rows or tables. Without sequences, sequential values can only be produced programmatically.