Sentence examples for before screening was introduced from inspiring English sources

But, since the declining trends started before screening was introduced and occurred also in non-screened age groups, improved cancer treatments such as adjuvant chemotherapy and tamoxifen may have been important determinants of breast cancer mortality reduction [ 21].

But if you look at prostate cancer statistics in the 1970s, long before screening was introduced, death rates have dropped only slightly since then.

Two mothers became pregnant before screening was introduced.

This decline started before screening was introduced, which does not suggest a screening effect.

4 It may be reasonable to exclude breast cancers detected before screening was introduced because screening cannot affect their prognosis.

Thus deaths from tumours diagnosed before screening was introduced were included in the cohorts nominally exposed to screening.

It included The Netherlands, but not data from before organised screening was introduced in the late 1980s.

Manitoba had substantial opportunistic screening before organised screening was introduced, 13 but we avoided this bias by estimating the prescreening trends from periods when there were few diagnoses of carcinoma in situ.

The last year before organised screening was introduced was 1990 in Copenhagen and 1992 in Funen, so we used 1991 as a compromise.

Prior to the introduction of effective screening of blood donors, blood transfusions were recognised as the leading source of HCV infection and some of these infections may have been acquired before adequate screening was introduced [ 21, 40].

Before GBS screening was introduced in USA and other developed countries, the great majority of neonatal sepsis, especially those occurring during the early neonatal period, were caused by this bacterium.