Research on diagnosis-related group grouping of inpatient medical expenditure in colorectal cancer patients based on a decision tree model

Table 3 Grouping results and the predicted medical costs

Group No.	Combination description	Number	Mean in RMB yuan	Standard deviation	Median in RMB yuan	Upper limit in RMB yuan	CV
1	Surgery, maintenance therapy, age ≤ 67 yr	55	50726.7	14973.5	49335.7	71075.8	0.24
2	Surgery, maintenance therapy, age > 67 yr	45	53285.4	16784.2	51533.9	78229.0	0.42
3	Surgery, chemotherapy or radiotherapy, age ≤ 67 yr	351	56827.3	17256.3	55964.2	89934.1	0.33
4	Surgery, chemotherapy or radiotherapy, age > 67 yr	297	61154.3	15147.8	60924.5	91365.2	0.54
5	Surgery, chemotherapy and radiotherapy, age ≤ 67 yr	80	62244.6	18475.6	61574.3	93574.2	0.65
6	Surgery, chemotherapy and radiotherapy, age > 67 yr	82	65647.3	17985.1	65879.1	95498.3	0.14
7	Non-surgery, maintenance therapy, age ≤ 67 yr	12	41995.3	11425.5	42703.1	67470.7	0.31
8	Non-surgery, maintenance therapy, age > 67 yr	32	42203.3	12574.3	44217.5	68154.2	0.56
9	Non-surgery, chemotherapy or radiotherapy, age ≤ 67 yr	16	52309.7	16785.1	50557	71256.1	0.64
10	Non-surgery, chemotherapy or radiotherapy, age > 67 yr	36	52775	14287.1	51427.2	72546.3	0.45
11	Non-surgery, chemotherapy and radiotherapy, age ≤ 67yr	10	55681.4	17694.2	53214.5	76085. 4	0.41
12	Non-surgery, chemotherapy and radiotherapy, age > 67 yr	10	56930	21454.1	53945.7	78945.0	0.71

P < 0.05 was considered statistically significant. CV: Coefficient of variation within each group.