Table 2 Mean proximal and distal length of sentinel basin from the reference point categorized into subgroups

Depth of tumor invasion

0.968

0.717

0.094

1.000

T1a

14

3.7 [2.0–4.5]

3.0 [2.3–5.5]

8.0 [5.5–10.5]

7.0 [4.0–9.5]

 ≥ T1b

11

3.5 [2.0–5.0]

3.4 [2.3–4.0]

6.0 [3.5–11.0]

7.0 [3.8–9.0]

Tumor size (cm)

0.244

0.639

0.375

0.791

 ≤ 2

9

2.9 [2.0–4.5]

3.0 [2.3–4.0]

6.0 [5.0–10.5]

7.0 [4.0–9.5]

 > 2

16

4.0 [2.0–5.0]

3.0 [2.3–5.5]

7.0 [3.5–11.0]

7.0 [3.8–9.0]

Tumor location (longitudinal)

0.234

1.000

0.130

0.912

High or mid-body

4

2.7 [2.4–3.0]

3.1 [3.0–3.2]

5.5 [3.5–7.0]

7.0 [3.8–8.0]

Low body or antrum

21

3.8 [2.0–5.0]

3.0 [2.3–5.5]

7.0 [5.0–11.0]

7.0 [4.0–9.5]

Tumor location (circumferential)

0.146

0.204

0.194

0.300

Lesser curvature

7

4.0 [2.4–5.0]

3.2 [2.5–4.0]

6.0*

5.5*

Greater curvature

7

2.0*

2.3*

7.0 [5.5–8.5]

7.0 [4.0–8.0]

Anterior wall

3

4.0 [3.5–4.0]

4.0 [2.8–5.5]

10.0 [9.0–11.0]

8.3 [7.5–9.0]

Posterior wall

8

2.9 [2.0–4.5]

3.0 [2.3–4.0]

6.3 [3.5–10.5]

5.8 [3.8–9.5]

No. of SLNs in total SB

0.967

0.384

0.035

0.006

 ≤ 12

16

3.4 [2.0–5.0]

3.0 [2.3–5.5]

6.0 [3.5–8.5]

5.5 [3.8–9.5]

 ≥ 13

9

3.7 [2.0–4.5]

3.2 [2.3–4.0]

8.0 [5.5–11.0]

7.5 [7.0–9.0]

No. of SLNs in main SB^†

0.898

0.210

0.101

0.027

 ≤ 9

15

3.5 [2.0–5.0]

3.0 [2.3–5.5]

6.0 [3.5–9.0]

5.5 [3.8–9.5]

 ≥ 10

10

3.9 [2.0–4.5]

3.6 [2.3–4.0]

7.5 [5.5–11.0]

7.3 [6.5–9.0]