Table 1.

Description of the main characteristics of breast cancer screening organization in the US, Norway, and Spain

	US	Norway	Spain
Organisation	Opportunistic screening	Population-based screening programme	Population-based screening programme
Target population	40 years and older	50-69 years	50-69 years
Screening interval	1-2 years	2 years	2 years
Reading method	Mostly single reading Some use of CAD	Independent reading with consensus or arbitration	Double reading with consensus or arbitration
Population coverage	Vary by insurance status and personal preference	100 %	100 %

CAD Computer-aided detection