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

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

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   
  1. Multivariable analysis of means.