Table 1

Characteristics of patients undergoing colon and rectal cancer surgery by presence/absence of a previous diagnosis of COPD, Denmark, 2005–2011

	Colon cancer				Rectal cancer
	COPD	Per cent	No COPD	Per cent	COPD	Per cent	No COPD	Per cent
Total	1006	100	11 047	100	443	100	5806	100
Age group (years)
0–59	40	4.0	1784	16.2	32	7.2	1280	22.0
60–69	178	17.7	3090	28.0	92	20.8	1934	33.3
70–79	406	40.3	3504	31.7	202	45.6	1654	28.5
80+	382	38.0	2669	24.1	117	26.4	938	16.2
Gender
Female	512	50.9	5604	50.7	173	39.1	2232	38.4
Male	494	49.1	5443	49.3	270	60.9	3574	61.6
Charlson score
0	572	56.9	8340	75.5	272	61.4	4625	79.7
1–2	335	33.3	2141	19.4	125	28.2	867	14.9
>3	99	9.8	566	5.1	46	10.4	314	5.4
Charlson score
Myocardial infarction	55	5.5	265	2.4	28	6.3	120	2.1
Congestive heart failure	131	13.0	346	3.1	43	9.7	133	2.3
Peripheral vascular disease	66	6.6	358	3.2	33	7.5	134	2.3
Cerebrovascular disease	104	10.3	701	6.4	43	9.7	288	5.0
Dementia	13	1.3	96	0.9	6	1.4	51	0.9
Connective tissue disease	42	4.2	225	2.0	13	2.9	68	1.2
Ulcer disease	46	4.6	351	3.2	15	3.4	55	1.0
Mild liver disease	9	0.9	51	0.5	6	1.3	28	0.5
Diabetes I and II	122	12.1	686	6.2	37	8.3	298	5.1
Hemiplegia	3	0.3	10	0.1	1	0.2	2	0.1
Moderate/severe renal disease	35	3.5	135	1.2	7	1.6	50	0.9
Diabetes with complication	51	5.1	304	2.8	18	4.1	131	2.3
Any tumour (except colon and rectal)	15	1.5	93	0.8	3	0.7	45	0.8
Leukaemia	0	0.0	5	0.1	1	0.2	2	0.03
Lymphoma	0	0.0	5	0.1	0	0.0	1	0.02
Moderate/severe liver disease	3	0.3	11	0.1	1	0.2	7	0.1
Metastatic solid tumour (except colon and rectal)	14	1.4	226	2.0	16	3.6	188	96.8
AIDS	1	0.1	3	0.03	0	0.0	2	0.03
Type of admission
Elective	683	67.9	7799	70.6	379	13.5	5202	9.9
Acute	322	32.0	3221	29.2	60	85.6	572	89.6
Unknown	1	0.1	27	0.2	4	0.9	32	0.5
Type of surgery
Open	636	63.2	6685	60.5	224	50.6	2838	48.9
Laparoscopic	257	25.6	3236	29.3	72	16.2	1160	20.0
Other	113	11.2	1126	10.2	147	33.2	1807	31.1
Cancer stage
Localised	450	44.7	4291	38.8	179	40.4	2048	35.3
Regional	202	20.1	2928	26.5	113	25.5	2033	35.0
Metastasised	214	21.3	2418	21.9	70	15.8	904	15.6
Unknown	140	13.9	1410	12.8	81	18.3	821	14.1

COPD, chronic obstructive pulmonary disease.