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

Table 2 Baseline data, mean ± SD

Baseline data	Observation group (n = 54)	Control group (n = 44)	χ2/t	P value
Gender			0.347	0.556
Male	25	23
Female	29	21
Age (years)	56.08 ± 6.23	56.04 ± 6.17	0.032	0.975
ASA classification			0.059	0.807
Class I-II	22	19
Class III	32	25
TNM staging			0.298	0.862
Stage I	21	17
Stage II	17	12
Stage III	16	15

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