Hospital factors and patient characteristics in the treatment of colorectal cancer: a population based study

BMC Public Health

Table 3 **Abdominoperineal (AP) resection* versus other resections ^† (reference group) in 7,033 incident rectal cancer patients**

	Total (N = 7033)	AP resection (N = 727)	Random-effect model^‡
	No.	%	OR	(95% CI)	P
Age (years)
≤60	1,342	17.4	1		<0.001
61-70	2,083	20.7	1.10	(0.91-1.33)
71-80	2,536	23.9	1.30	(1.08-1.56)
>80	1,072	24.6	1.38	(1.11-1.71)
Gender
Male	4,275	23.0	1		0.002
Female	2,758	19.9	0.78	(0.69-0.89)
Educational level
Secondary or more	969	17.7	1		<0.001
Intermediate	1,516	19.2	1.11	(0.90-1.38)
Primary	3,796	23.9	1.40	(1.16-1.70)
Unknown	752	22.1	1.29	(0.97-1.70)
Marital status
Married	4,651	21.3	1		0.002
Unmarried^§	1,854	24.2	1.17	(1.02-1.35)
Unknown	528	17.6	0.83	(0.63-1.10)
OPE ^‡
No	5,437	22.5	1		0.05
Yes	1,596	19.6	0.87	(0.75-1.01)
Disease staging
Absence of metastases	6,180	21.8	1		0.82
Presence of metastases	853	22.3	1.11	(0.93-1.32)
Comorbidity (Charlson index)
0	5,174	21.5	1		0.24
≥1	1,859	22.8	1.01	(0.89-1.16)
Year of admission
2000	861	23.0	1		0.04
2001	887	23.9	1.12	(0.89-1.41)
2002	789	23.7	1.06	(0.84-1.35)
2003	825	19.1	0.87	(0.68-1.11)
2004	961	20.0	0.92	(0.73-1.16)
2005	906	22.2	1.02	(0.80-1.28)
2006	923	23.4	1.08	(0.86-1.36)
2007	881	19.4	0.85	(0.67-1.09)
Hospital volume (annual caseload)
>25	3,688	20.6	1		0.001
11-25	2,560	22.1	1.03	(0.81-1.31)
≤10	785	26.6	1.37	(1.03-1.82)

*ICD9: 48.5, 48.62. ^†ICD9: 45.4x-45.8x, 48.3x-48.4x, 48.61, 48.63-48.69.
^‡Cases with obstruction or perforation or in emergency admission were classified in the OPE category.
^§Unmarried includes single, separated, divorced and widowed.
OR: odds ratio, CI: confidence interval, APR-DRG: all-patient-refined-diagnosis-related group, OPE: obstruction, perforation or emergency admission.

ISSN: 1471-2458