Accuracy of dual-contrast gastrointestinal ultrasonography in predicting lymph node metastasis in older adults with gastric cancer

Table 1 General data (mean ± SD), n (%)

Data class	Lymph node metastasis (n = 35)	No metastasis (n = 65)	t/χ2	P value
Sex
Male	18 (51.43)	35 (53.85)	0.053	0.817
Female	17 (48.57)	30 (46.15)
Age (years)	56.24 ± 5.71	55.38 ± 5.43	0.742	0.461
Body mass index (kg/m2)	24.17 ± 1.15	24.09 ± 1.03	0.356	0.723
Duration of disease (years)	2.31 ± 0.46	2.24 ± 0.51	0.677	0.501
Tumor diameter (mm)	4.08 ± 0.75	3.97 ± 0.72	0.718	0.475
TNM staging
Phase I	25 (71.43)	61 (93.85)	9.496	0.002
Phase II	10 (28.57)	4 (6.15)