Figure 1 | British Journal of Cancer

Figure 1

From: Mammography service screening and breast cancer mortality in New Zealand: a National Cohort Study 1999–2011

Figure 1

Individual examples of person-year contributions to screening exposure and non-exposure under a variety of screening participation scenarios. The total cumulated person-years of participation and non-participation in screening up to the end of 2003 (vertical line) in a hypothetical cohort of 20 women aged 40–65 years in 1999. Cumulated person-years contributing to participation is 18, and the total cumulated person-years from first eligibility contributing to screening non-participation is 30.

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