Feasibility and safety of enhanced recovery after surgery in elderly patients with gastric cancer

Table 2 Main clinicopathological features of patients in two groups

Variables	Young group (n = 79)	Elderly group (n = 82)	t/Z/χ2	P value
Age (year)	54.3 ± 7.7	71.6 ± 5.0	-16.861	< 0.001
Sex (female/male)	28/52	23/59	1.016	0.313
BMI (kg/m2)			-1	0.117
< 18.5	1 (1.3)	6 (7.3)
≥ 18.5	78 (98.7)	76 (92.7)
ASA I/II/III	37 (46.8)/38 (48.1)/4 (5.1)	13 (15.9)/61 (74.4)/8 (9.8)	18.147	< 0.001
Preoperational albumin (g/L)			0.173	0.677
< 30	8 (10.1)	10 (89.9)
≥ 30	71 (12.2)	72 (87.8)
Preoperative comorbidities
Hypertension	27 (34.2)	48 (58.5)	9.595	0.002
Diabetes	14 (17.7)	31 (37.8)	8.059	0.005
Heart disease	4 (5.1)	14 (17.1)	5.844	0.016
Respiratory diseases	2 (2.5)	9 (11.0)	4.507	0.034
Preoperative WBC (109/L)	5.2 ± 2.0	5.5 ± 2.2	-0.928	0.355
Preoperative CRP (mg/L)	0.5 (0.01)	0.5 (1.9)	-2.686	0.007
Preoperative IL-6 (pg/mL)	3 (5.6)	3.7 (8.1)	-0.842	0.400
TNM classification I/II/III/IV	37 (46.8)/22 (27.8)/17 (21.5)/3 (3.8)	27 (32.9)/30 (36.6)/23 (28.0)/2 (2.4)	3.875	0.267
Number of lymph nodes metastatic	0 (2)	1 (4)	-0.892	0.372
Differentiation			1.806	0.404
Poorly differentiated	27 (34.2)	21 (25.6)
Moderately differentiated	50 (63.3)	57 (69.5)
Highly differentiated	2 (2.5)	4 (4.9)

¹When performing χ² tests, Fisher's exact test did not provide a χ² value in the results.

Data are shown as mean ± SD, median (interquartile range), or n (%). BMI: Body mass index; ASA: American Society of Anesthesiologists classification; WBC: White blood cell; CRP: C-reactive protein.