Table 3 Univariate analysis of risk factors for death from other diseases

Age (years)

< 0.001

 < 70

529

  2.6

  8.2

 ≥ 70

281

15.3

32.5

Gender

   0.233

 Male

587

  7.5

17.9

 Female

223

  5.8

12.8

Performance status (ECOG)

< 0.001

 0

679

  3.8

10.9

 1/2/3

131

23.7

44.6

Body mass index (kg/m²)

   0.019

 < 22.0

334

  8.7

21.3

 ≥ 22.0

476

  5.9

13.1

Charlson Comorbidity Index score

< 0.001

 0

542

  2.5

  9.3

 1/2

232

13.8

25.8

 ≥ 3

  36

33.3

64.1

Cardiovascular disease

< 0.001

 Absent

749

  6.4

15.3

 Present

  61

14.8

32.0

Respiratory disease

< 0.001

 Absent

756

  6.1

15.0

 Present

  54

20.4

38.4

Renal disease

< 0.001

 Absent

775

  5.5

14.3

 Present

  35

40.0

63.1

Liver disease

   0.033

 Absent

775

  6.5

15.8

 Present

  35

20.0

31.7

Endocrine and collagen disease

   0.006

 Absent

711

  6.2

15.3

 Present

  99

13.1

25.1

Neurological disease

< 0.001

 Absent

759

  6.2

15.2

 Present

  51

19.6

37.5

Type of gastrectomy

< 0.001

 TG

225

10.2

24.1

 DG/PG/PPG

585

  5.8

13.6

Lymphadenectomy

< 0.001

 D1/1+

446

10.3

22.0

 D2/3

364

  3.0

10.0

Combined resection

   0.122

 Absent

700

  7.4

16.4

 Present

110

  4.5

16.7

Postoperative stay in hospital (days)

   0.001

 < 20

450

  5.3

12.3

 ≥ 20

360

  9.2

21.5

Operative time (min.)

   0.044

 < 250

337

11.0

21.0

 ≥ 250

473

  4.2

13.2

Blood loss (mL)

   0.813

 < 250

422

  7.6

15.6

 ≥ 250

388

  6.4

17.1

Postoperative complications*

< 0.001

 Absent

602

  5.2

12.9

 Present

208

12.5

27.2

Pathological stage†

   0.002

 pStage I

661

  5.4

14.3

 pStage II/III

149

14.1

26.1