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Table 1 Baseline characteristics and in-hospital mortality in the derivation cohort

From: In-hospital mortality after surgery: a retrospective cohort study in a Japanese university hospital

Characteristic

Non-dead

n = 8244

In-hospital mortality

n = 170

p value

Age (years)

51.6 ± 26.0

69.5 ± 14.6

<0.00001

≥75 years

1736 (21.1)

71 (41.8)

<0.00001

Female gender

3999 (48.5)

62 (36.5)

<0.0001

Height

152 ± 23.2

158.4 ± 11.2

<0.0003

Weight

52.5 ± 17.9

53.6 ± 13.0

0.2257

BMI

21.8 ± 4.4

21.2 ± 4.1

0.0393

ASA-PS

   

 ASA-I

3465 (42.0)

2 (1.2)

 

 ASA-II

3782 (45.9)

52 (30.6)

 

 ASA-III

859 (10.4)

74 (43.5)

 

 ASA-IV

136 (1.6)

38 (22.4)

 

 ASA-V

2 (0.0)

4 (2.4)

 

 ASA ≥ 3

997 (12.1)

116 (68.2)

<0.00001

Emergency surgery

1029 (12.5)

94 (55.3)

<0.00001

  1. Data are given as the mean ± SD or n (%). Because some patients underwent more than one surgery/anesthesia during the same hospital stay, the analysis was made using the first surgery/anesthesia. In the database, height was not given for 17 (0.10 %) cases, weight for 11 (0.06 %) cases, and BMI for 19 (0.11 %) cases