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

Table 4 Short-term outcomes after surgery in two groups

Variables	Young group (n = 79)	Elderly group (n = 82)	t/Z/χ2	P value
ERAS compliance rate	68 (86.1)	70 (85.4)	0.017	0.898
Reoperation	1 (1.3)	1 (1.2)	-1	1.000
Preoperative mortality rate within 30 days	0 (0)	0 (0)	-2	-2
Preoperative D1 WBC (109/L)	12.8 ± 3.4	12.1 ± 4.3	1.075	0.284
Preoperative D3 WBC (109/L)	7.9 ± 2.4	8.1 ± 2.7	-0.577	0.565
Preoperative D1 CRP (mg/L)	29.0 (41.6)	30.4 (27.9)	-0.719	0.472
Preoperative D3 CRP (mg/L)	38.3 (52.1)	42.0 (49.2)	-0.955	0.339
Preoperative D1 IL-6 (pg/mL)	23.2 (35.6)	25.4 (47.5)	-0.692	0.489
Preoperative D3 IL-6 (pg/mL)	12.5 (21.7)	13.7 (19.1)	-0.626	0.532
Preoperative first ventilation time (hour)	50.9 ± 18.4	53.4 ± 16.9	-0.877	0.382
Preoperative hospital stays (day)	7 (3)	7 (3)	-1.262	0.207
Preoperative anastomotic leakage	4 (5.1)	3 (3.7)	-1	0.716
Preoperative incision infection	3 (3.8)	4 (4.9)	-1	1.000
Preoperative pulmonary infection	4 (5.1)	5 (6.1)	-1	1.000

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

²As the data for "30-day postoperative mortality" showed zero variance, the χ² test did not generate any statistical values (χ² value and P value).

Data are shown as mean ± SD, median (interquartile range), or n (%). Some patients had more than one complication. Patients included in this study were followed up to 30 days after surgery. ERAS: Enhanced recovery after surgery; WBC: White blood cell; CRP: C-reactive protein.