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

Table 2 Multivariate analysis of high inpatient expenditure

Variable	Variable assignment	Regression coefficient	Standardregression coefficient	t	P value
Gender	Male = 0
	Female = 1	-0.007	-0.032	2.017	< 0.05
Age	Actual value	0.015	0.043	9.371	< 0.05
Length of hospital stay	Actual value	0.039	0.231	18.27	< 0.05
Surgery	No = 0				< 0.05
	Yes = 1	0.595	0.109	15.67	< 0.05
Treatment	Maintenance therapy = 0				< 0.05
	Radiotherapy = 1	5.294	0.042	2.62	< 0.05
	Chemotherapy = 2	4.786	0.073	2.37	< 0.05
	Radiotherapy and chemotherapy = 3	2.813	0.321	25.84	< 0.05

P < 0.05 was considered statistically significant.