We used educational status as a proxy for socio-economic status, and educational status was an independent significant predictor for mammographic screening participation in our data.
The present patient data comprise mammographic screening cases characterised by early cancer detection, modern diagnostic and therapeutic methods, and long-term follow-up.
The benefit of mammographic screening was established principally from mortality data on women screened at age 50 or older, and while comparable data in younger women are available from some of the RCTs, none included sufficient numbers to reliably estimate the mortality effect.
Very little data on opportunistic mammographic screening is available in LMICs in Asia.
We used data from the Copenhagen mammographic screening register from 1 April 1991 until 14 April 2008, containing ID-number for each women and bi-annual sequence of invitation dates, screening dates, history of reminders, and screening outcome.
The prospective nature with dietary data collected prior to mammographic screening, sample size, length of follow-up, and wide range of potential risk factors are major strengths of this study.
Mammographic screening status of these cancers was determined by matching data from the 11 breast screening units in the East of England with the ECRIC registry database.
There are no data available to explore other aspects of mammographic screening in this population, such as increased frequency or better sensitivity due to higher volume [ 29].
We estimated the overdiagnosis of breast cancer due to screening in women aged 40 to 49 years using data from a randomised trial of annual mammographic screening starting at age 40 conducted in the UK.
Although the benefit of mammographic screening is lower in women aged in their 40s, the data for NNI calculation was based on the results of RCTs conducted in Western countries.
