Surgical Quality in Rectal Cancer Management: What Can Be Achieved by a Voluntary Observational Study?

Table 2

Changes between 2000 and 2012 of histopathologic tumour stage.

Year	pT0 (%)	pT1 (%)	pT2 (%)	pT3 (%)	pT4 (%)	pN0 (%)	pN1 (%)	pN2 (%)
2000	1.6	9.0	25.3	51.7	6.5	50.3	17.7	21.7
2001	2.0	10.6	26.7	50.2	6.1	53.3	19.7	18.6
2002	2.1	8.4	29.2	48.5	6.6	52.1	17.6	20.5
2003	2.0	11.6	26.0	47.2	6.1	50.4	19.2	19.8
2004	2.9	10.9	26.1	47.1	7.1	52.1	20.8	16.6
2005	2.1	10.6	28.5	48.6	5.6	54.0	20.8	18.4
2006	1.3	11.5	29.0	45.9	6.3	54.9	20.8	16.8
2007	2.5	14.4	27.2	47.0	5.1	59.9	17.5	17.9
2008	4.2	12.2	24.1	44.9	10.2	53.8	21.2	18.2
2009	3.2	9.6	26.1	48.7	10.2	54.5	21.1	19.2
2010	2.9	14.0	23.9	45.9	10.5	54.4	20.4	19.2
2011	5.1	11.3	25.9	48.4	6.5	54.7	21.1	18.0
2012	4.7	12.3	29.1	46.8	5.6	58.5	20.7	14.9
Pearson’s correlation coefficient	0.787↑	0.563↑	−0.089	−0.580↓	0.343	0.672↑	0.593↑	−0.591↓
(2-sided)	<0.001	0.045	0.772	0.038	0.251	0.012	0.033	0.033