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. 2018 Jun 13;25(Suppl 1):S115–S124. doi: 10.3747/co.25.3770

TABLE II.

Summary of quality indicators for women 50–69 years of age in organized breast cancer screening programs across Canada, 2011–2012 screen yearsa

Quality indicator Screening target Performance
Rate (%) of ...
  Participation ≥70 54
  Retention within 30 months of subsequent screen ≥90 82.6
  Annual screening within 18 months of subsequent screen NA 31.8
  Abnormal call subsequent screens <5 7.2
Invasive cancers (n) detected on subsequent screen (per 1000 screens) >3 3.7
In situ cancers (n) detected on subsequent screen (per 1000 screens) NA 0.8
Sensitivity (%) NA 84.3
Screen-detected invasive tumour size ≤15 mm (%) >50 59.2
Node-negative screen-detected invasive cancers (%) >70 76.4
Diagnostic interval (%)
  First diagnostic assessment within 3 weeks ≥90 66.1
  Final diagnosis (with no tissue biopsy) within 5 weeks ≥90 79.1
  Final diagnosis (biopsy) within 7 weeks ≥90 54.9
Post-screen invasive cancers (n per 10,000 person–years), 12–24 months <12 12.7
Positive predictive value (%), subsequent screen ≥6 6.5
a

Adapted from Canadian Partnership Against Cancer, 201211.