Table 4.

Age- and year-adjusted odds ratios for adverse tumor characteristics according to screening participation (1996-2012). AGES 40-49

	Odds Ratios* (95% Confidence Interval)
	Screened	Non-Screened	P-value
Invasive (vs. in situ)	1.00 (Ref)	4.85 (3.40, 6.91)	<0.0001
Late stage	1.00 (Ref)	2.77 (2.20, 3.48)	<0.0001
Large size	1.00 (Ref)	3.70 (2.90, 4.73)	<0.0001
High grade (vs. low/intermediate)	1.00 (Ref)	1.33 (1.04-1.69)	0.02
ER negative	1.00 (Ref)	1.50 (1.11, 2.03)	0.01
Any nodes removed	1.00 (Ref)	1.89 (1.44, 2.48)	<0.0001
Regional nodes removed	1.00 (Ref)	1.94 (1.54-2.44)	<0.0001
Nodes positive	1.00 (Ref)	2.48 (1.97, 3.13)	<0.0001
Mastectomy	1.00 (Ref)	1.28 (1.00, 1.62)	0.05

^*All analysis adjusted for year and age