Table 5 Primary and secondary outcomes and observation indexes

Primary outcomes

 All-cause mortality

  1-year mortality

0

2 (0.81%)

–

–

 Ischemic cardiac event

  Myocardial ischemia

32 (12.6%)

20 (8.13%)

0.61 (0.34–1.11)

0.10

  Myocardial infarction

13 (5.12%)

8 (3.25%)

0.62 (0.25–1.53)

0.30

  Arrhythmia

1 (0.39%)

3 (1.22%)

3.12 (0.32–30.23)

0.33

  Heart failure

1 (0.39%)

4 (1.63%)

4.18 (0.46–37.68)

0.20

Secondary outcomes

 Shock

17 (6.69%)

12 (4.88%)

0.72 (0.33–1.53)

0.39

 Infection

18 (7.09%)

8 (3.25%)

0.44 (0.19–1.03)

0.06

  Incision infection

10 (3.94%)

3 (1.22%)

0.30 (0.08–1.11)

0.07

  Digestive system infection

1 (0.39%)

1 (0.41%)

1.03 (0.06–16.60)

0.98

  Lung infection

7 (2.76%)

4 (1.6%)

0.58 (0.17–2.02)

0.40

 Renal impairment

5 (1.97%)

2 (0.81%)

0.41 (0.08–2.12)

0.29

 Observation index

  ICU admission [case (%)]

182 (71.65%)

193 (78.46%)

1.44 (0.96–2.17)

0.08

  Duration of ICU stay (day)

1.53 ± 2.08

1.79 ± 2.66

0.26 (− 0.16, 0.68)

0.23

  Duration of hospital time (day)

19.76 ± 7.26

21.54 ± 12.11

1.78 (0.03, 3.53)

0.04

  Hospital costs (¥: Ten thousand)

9.05 ± 4.32

10.70 ± 8.33

1.66 (0.50, 2.82)

0.01