Construction of a risk prediction model for postoperative cognitive dysfunction in colorectal cancer patients

Table 1 General data, mean ± SD

General data	Modeling group (n = 98)	Validation group (n = 42)	χ2/t	P value
Gender			0.136	0.712
Male	48	22
Female	50	20
Age (years)	56.12 ± 6.33	56.23 ± 6.27	0.094	0.925
ASA classification			1.979	0.159
Class I-II	41	23
Class III	57	19
TNM staging			0.510	0.775
Stage I	38	19
Stage II	29	11
Stage III	31	12

TNM: Tumor node metastasis; ASA: American Society of Anesthesiologists.