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.