Table 2 Univariate and multivariate analyses of risk factors for local residual cancer

Age (y)

 ≤60

8 (17.4)

1.000

 >60

10 (11.5)

0.617

0.225–1.690

0.347

Gender (n)

 Male

14 (14.9)

1.000

 Female

4 (10.3)

0.653

0.201–2.125

0.479

Tumor location

0.349

 Cardia and fundus

6 (11.3)

1.000

0.301–3.326

1.000

 Body

6 (22.2)

2.238

0.646–7.758

0.204

 Antrum

6 (11.3)

1.000

Tumor size (cm)

 ≤2.0

7 (12.1)

1.000

 >2.0

11 (14.7)

1.252

0.453–3.461

0.665

Tumor differentiation

0.129

0.325

 Differentiated-type

7 (10.4)

1.000

1.000

 Undifferentiated-type

4 (33.3)

4.286

1.023–17.96

0.047

3.317

0.666–16.51

0.143

 Mixed-type

7 (13.0)

1.277

0.419–3.893

0.668

1.663

0.501–5.520

0.406

Tumor invasion

 Mucosa (T1a)

9 (20.0)

1.000

 Submucosa (T1b)

9 (10.2)

0.456

0.167–1.244

0.125

Ulceration

 Positive

2 (11.8)

0.833

0.174–3.993

0.820

 Negative

16 (13.8)

1.000

Lymphatic invasion

 Positive

2 (11.8)

0.833

0.174–3.993

0.820

 Negative

16(13.8)

1.000

Vascular invasion

 Positive

2 (11.8)

0.833

0.174–3.993

0.820

 Negative

16 (13.8)

1.000

Perineural invasion

 Positive

0 (0.0)

0.000

0.999

 Negative

18 (13.7)

1.000

Horizontal margin

 Positive

6 (54.5)

11.00

2.915–41.51

< 0.001

10.53

2.590–42.83

0.001

 Negative

12 (9.8)

1.000

1.000

Vertical margin

 Positive

4 (19.0)

1.647

0.484–5.605

0.425

 Negative

14 (12.5)

1.000