Table 4

Comparison of the three versions of the review in terms of accepting or rejecting the five categories

	Overdiagnosis			Overtreatment			Breast cancer mortality			Total mortality			Methods
Comparing 2001–2006	2001	2006	p	2001	2006	p	2001	2006	p	2001	2006	p	2001	2006	p
Accepted	4 (3%)	4 (19%)	0.02	5 (4%)	2 (10%)	0.25	0	3 (14%)	0.00	4 (3%)	0	1.00	8 (6%)	1 (5%)	1.00
Rejected	0	0	1.00	4 (3%)	0	1.00	29 (21%)	2 (10%)	0.38	9 (6%)	0	0.60	29 (21%)	0	0.05
Comparing 2001–2009	2001	2009	p	2001	2009	p	2001	2009	p	2001	2009	p	2001	2009	p
Accepted	4 (3%)	3 (30%)	0.01	5 (4%)	2 (20%)	0.09	0	3 (30%)	0.00	4 (3%)	2 (20%)	0.07	8 (6%)	1 (10%)	0.48
Rejected	0	0	1.00	4 (3%)	1 (10%)	0.31	29 (21%)	2 (20%)	1.00	9 (6%)	0	1.00	29 (21%)	0	0.37
Comparing 2006–2009	2006	2009	p	2006	2009	p	2006	2009	p	2006	2009	p	2006	2009	p
Accepted	4 (19%)	3 (30%)	0.67	2 (10%)	2 (20%)	0.59	3 (14%)	3 (30%)	0.64	0	2 (20%)	0.13	1 (5%)	1 (10%)	1.00
Rejected	0	0	1.00	0	1 (10%)	0.34	2 (10%)	2 (20%)	0.59	0	0	1.00	0	0	1.00

Percentages in brackets are calculated from the total number of articles cited in that version of the review. The total number of articles cited in the 2001 version: 140. The total number of articles cited in the 2006 version: 22. The total number of articles cited in the 2009 version: 10. Two tailed p values are shown.