Table 2 Factors associated with the presence of liver metastases at diagnosis of small bowel cancer

Age

 < 40

Reference

NA

 40–59

0.98 (0.73–1.30)

 60–79

0.95 (0.72–1.26)

 ≥ 80

0.82 (0.60–1.13)

Race

 Black

Reference

NA

 White

1.05 (0.90–1.22)

 Others^a

0.90 (0.67–1.20)

 Unknown

0.18 (0.06–0.57)

Gender

 Male

Reference

NA

 Female

0.96 (0.86–1.08)

Insurance status

 No

Reference

NA

 Yes

0.81 (0.59–1.10)

 Unknown

0.44 (0.25–0.77)

Marital status

 Unmarried

Reference

NA

 Married

1.03 (0.92–1.16)

 Unknown

0.83 (0.64–1.08)

Primary site

 Duodenum

Reference

Reference

 Jejunum

0.95 (0.76–1.19)

1.38 (1.07–1.78)

 Ileum

1.37 (1.19–1.58)

2.06 (1.70–2.50)

 Other site^b

0.81 (0.48–1.37)

1.18 (0.66–2.09)

 Unknown

1.69 (1.46–1.96)

2.28 (1.89–2.74)

Grade

 I

Reference

Reference

 II

1.25 (1.07–1.47)

1.11 (0.92–1.34)

 III

1.96 (1.62–2.37)

1.54 (1.21–1.96)

 IV

1.92 (1.24–2.98)

2.54 (1.56–4.12)

 Unknown

1.97 (1.71–2.27)

1.69 (1.43–2.00)

Histologic type

 Adenocarcinoma

Reference

Reference

 NEC

0.73 (0.65–0.83)

0.98 (0.80–1.18)

 GISS

0.41 (0.32–0.51)

0.56 (0.41–0.75)

T stage

 T1

Reference

Reference

 T2

1.25 (0.95–1.66)

0.57 (0.40–0.80)

 T3

2.33 (0.95–1.66)

0.71(0.52–0.97)

 T4

3.29 (1.85–2.94)

0.94 (0.69–1.28)

 Unknown

6.27 (4.95–7.95)

1.62 (1.19–2.21)

Tumor size, cm

 0–1

Reference

Reference

 1–2

4.62 (3.40–6.27)

3.83 (2.66–5.52)

 2–5

6.76 (5.04–9.07)

5.53 (3.85–7.94)

 > 5

4.32 (3.14–5.94)

4.38 (2.91–6.59)

 Unknown

12.4 (9.19–16.6)

6.75 (4.67–9.73)

N stage

 N0

Reference

Reference

 N1

2.13 (1.89–2.41)

1.87 (1.60–2.18)

 N2

1.53 (1.12–2.09)

1.19 (0.84–1.69)

 Unknown

5.89 (4.68–7.40)

2.12 (1.62–2.77)

Extrahepatic metastatic sites to bone, lung, and brain, No

 0

Reference

Reference

 1

8.10 (6.24–10.5)

5.14 (3.86–6.84)

 2

7.41 (2.76–19.9)

4.35 (1.53–12.3)

 Unknown

10.9 (6.94–17.2)

6.29 (3.89–10.2)