Hospital costs associated with surgical morbidity after elective colorectal procedures: a retrospective observational cohort study in 530 patients

Table 6 Accumulation of costs (EUR) in relation to comorbidity score (1-6+), complexity of procedure (1–4), presence of complication or re-operation

Comorbidity score	N	Mean EUR	Std. Error	95% Confidence interval for Mean		P-value
				Lower bound	Upper bound
0	132	12760	677	11420	14100
1	41	28480	9340	9600	47360
2	208	15970	862	14270	17670
3	89	17220	1122	14990	19450
4	22	2,600	3442	16440	30750	0,000003***	Kruskal-Wallis
5	15	16580	2166	11930	21230
6	23	24770	4302	15850	33690
Total	530	17060	884	15330	18800
Operationcomplexity
1	280	14810	1468	11920	17700
2	81	15680	1086	13520	17850	0,000001***	Kruskal-Wallis
3	144	19700	1198	17340	22070
4	25	31590	3039	25320	37870
Total	530	17060	884	15330	18800
Complication
absent	344	12410	384	11650	13160
present	186	25680	2289	21160	30200	0,000003***	Mann–Whitney
Total	530	17060	884	15330	18800
Re-operation
absent	475	12880	402	10950	13970
present	55	38050	327	35380	42200	0,00001***	Mann–Whitney
Total	530	17060	884	15330	18800

ISSN: 1754-9493