Katja Kemp Jacobsen1, My von Euler-Chelpin. 1. Department of Public Health, University of Copenhagen, Øster Farimagsgade 5 opg. B, Postbox 2099, DK-1014 Copenhagen K, Denmark. kkja@sund.ku.dk
Abstract
BACKGROUND: A population's acceptance of a screening programme is reflected by its participation. Participation can be measured by cross-section, in an individual screening round, or by cumulative examination rate, which covers participation in numerous rounds at a pre-specified frequency. To establish an informed overview of programme performance, the relationship between these measures was analysed. METHODS: The Central Population Register (CPR) of Denmark was used to define the total population. The data sources were mammography screening programmes in Copenhagen (1991-2008) and Funen (1993-2008) and participation and coverage rates were calculated according to European guidelines. Long-term adherence was defined as the cumulative examination rate. RESULTS: The participation rates were 71% in Copenhagen and 91% in Funen. The cumulative examination rates across all invitation rounds were between 21 and 24% lower than the average participation rates. CONCLUSIONS: If the cumulative examination rate across all, or the majority of, invitation rounds is substantially lower than the average participation rate it may suggest that standard cross-sectional performance indicators overestimate the level of protection provided to the women targeted by the programme. Consequently, it may prove valuable to include cumulative examination rate as a performance indicator of mammography screening.
BACKGROUND: A population's acceptance of a screening programme is reflected by its participation. Participation can be measured by cross-section, in an individual screening round, or by cumulative examination rate, which covers participation in numerous rounds at a pre-specified frequency. To establish an informed overview of programme performance, the relationship between these measures was analysed. METHODS: The Central Population Register (CPR) of Denmark was used to define the total population. The data sources were mammography screening programmes in Copenhagen (1991-2008) and Funen (1993-2008) and participation and coverage rates were calculated according to European guidelines. Long-term adherence was defined as the cumulative examination rate. RESULTS: The participation rates were 71% in Copenhagen and 91% in Funen. The cumulative examination rates across all invitation rounds were between 21 and 24% lower than the average participation rates. CONCLUSIONS: If the cumulative examination rate across all, or the majority of, invitation rounds is substantially lower than the average participation rate it may suggest that standard cross-sectional performance indicators overestimate the level of protection provided to the women targeted by the programme. Consequently, it may prove valuable to include cumulative examination rate as a performance indicator of mammography screening.
Authors: Katja Kemp Jacobsen; Ellen S O'Meara; Dustin Key; Diana S M Buist; Karla Kerlikowske; Ilse Vejborg; Brian L Sprague; Elsebeth Lynge; My von Euler-Chelpin Journal: Int J Cancer Date: 2015-06-01 Impact factor: 7.396
Authors: Katja Kemp Jacobsen; Linn Abraham; Diana S M Buist; Rebecca A Hubbard; Ellen S O'Meara; Brian L Sprague; Karla Kerlikowske; Ilse Vejborg; My Von Euler-Chelpin; Sisse Helle Njor Journal: Cancer Epidemiol Date: 2015-05-23 Impact factor: 2.984
Authors: Zorana J Andersen; Jennifer L Baker; Kristine Bihrmann; Ilse Vejborg; Thorkild I A Sørensen; Elsebeth Lynge Journal: Breast Cancer Res Date: 2014-01-20 Impact factor: 6.466