TABLE II.

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

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

^aAdapted from Canadian Partnership Against Cancer, 2012¹¹.