Table 2. Mortality among digestive system cancer patients who underwent surgical resection by cancer types and age-adjusted Charlson comorbidity index score from 2013 to 2015.

Cancer type	Total	Event (%)	P-value
Overall	315464	3631 (1.2)	< 0.001
ACCI score 0–1	48192	270 (0.6)
2–3	150693	1319 (0.9)
4–5	74818	1199 (1.6)
≥ 6	41491	843 (2.0)
Esophagus	52495	798 (1.5)	< 0.001
ACCI score 0–1	4976	42 (0.8)
2–3	30738	386 (1.3)
4–5	11345	248 (2.2)
≥ 6	5436	122 (2.2)
Stomach	103799	1293 (1.2)	< 0.001
ACCI score 0–1	14788	113 (0.8)
2–3	53329	511 (1.0)
4–5	23047	399 (1.7)
≥ 6	12635	270 (2.1)
Colorectum	124246	1123 (0.9)	< 0.001
ACCI score 0–1	18921	91 (0.5)
2–3	52466	286 (0.5)
4–5	32397	406 (1.3)
≥ 6	20462	340 (1.7)
Liver and gallbladder	68343	842 (1.2)	< 0.001
ACCI score 0–1	11964	51 (0.4)
2–3	31414	297 (0.9)
4–5	15511	266 (1.7)
≥ 6	9454	228 (2.4)
Pancreas	18125	390 (2.2)	< 0.001
ACCI score 0–1	2884	29 (1.0)
2–3	8948	159 (1.8)
4–5	4063	127 (3.1)
≥ 6	2230	75 (3.4)

ACCI: age-adjusted Charlson comorbidity index.