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

Table 1

Changes between 2000 and 2012 of patient-related factors including age, gender, ASA stage, and pretreatment imaging.

Year	Age/MAD (years)	Male (%)	Female (%)	ASA I (%)	ASA II (%)	ASA III (%)	ASA IV (%)	CT (%)	MRI (%)
2000	67.00 7.0000	58.7	41.3	10.4	55.4	32.3	2.0	66.5	4.8
2001	67.00 7.0000	57.5	42.5	11.6	51.2	35.4	1.8	73.0	7.8
2002	66.00 7.0000	59.3	40.7	11.2	52.6	34.2	2.0	73.5	7.2
2003	67.00 7.0000	56.4	43.6	9.5	54.1	33.9	2.4	74.6	7.8
2004	68.00 7.0000	59.3	40.7	8.6	51.8	36.5	3.1	75.7	11.8
2005	68.00 7.0000	59.6	40.4	7.2	51.0	39.7	2.1	82.3	15.2
2006	68.00 6.0000	59.6	40.4	6.8	52.2	39.6	1.4	82.4	17.4
2007	69.00 7.0000	61.9	38.1	6.5	49.5	42.0	2.0	80.4	24.0
2008	68.00 8.0000	60.8	39.2	7.5	48.7	41.5	2.3	82.3	26.7
2009	69.00 8.0000	62.4	37.6	5.7	52.1	39.6	2.6	84.3	30.6
2010	70.00 7.0000	61.8	38.2	6.2	47.3	42.9	3.7	84.3	36.2
2011	69.00 8.0000	61.7	38.3	7.2	51.4	38.2	3.3	88.4	37.1
2012	70.00 7.0000	62.7	37.3	5.1	51.6	39.9	3.5	85.8	37.4
Pearson’s correlation coefficient	0.899↑	0.862↑	−0.862↓	−0.892↓	−0.575↓	0.783↑	0.673↑	0.939↑	0.982↑
(2-sided)	<0.001	<0.001	<0.001	<0.001	0.040	0.002	0.012	<0.001	<0.001

MAD: median absolute deviation.