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Table 2 Clinical outcomes before and after propensity score matching

From: Mortality analysis among sepsis patients in and out of intensive care units using the Japanese nationwide medical claims database: a study by the Japan Sepsis Alliance study group

 

Before matching

After matching

Non-ICU

(n = 974,289)

ICU

(n = 193,612)

Difference

(95% CI)

Non-ICU

(n = 165,344)

ICU

(n = 165,344)

Difference (95% CI)

In-hospital mortality, n (%)

218,928 (22.5)

50,686 (26.2)

3.7 (3.5 to 3.9)

48,328 (29.2)

42,4701 (25.8)

\(-\) 3.4 (\(-\) 3.7 to \(-\) 3.1)

Length of hospitalization (day)

  

14.1 (13.6 to 14.6)

  

2.9 (2.2 to 3.6)

 Mean (SD)

42.2 (100.8)

56.3 (66.7)

 

52.8 (129.3)

55.7 (67.0)

 

 Median (IQR)

26 (14–50)

40 (21–70)

 

34 (17–64)

39 (21–69)

 

Length of ICU stay (day)

  

NA

  

NA

 Mean (SD)

NA

7.0 (6.0)

 

NA

6.4 (5.6)

 

 Median (IQR)

NA

5 (2–12)

 

NA

5 (2–10)

 

Ventilator-free days

  

\(-\) 4.2 (\(-\) 4.3 to \(-\) 4.2)

  

\(-\) 1.2 (\(-\) 1.3 to \(-\) 1.2)

 Mean (SD)

25.3 (7.9)

21.0 (10.1)

 

23.0 (9.6)

21.7 (9.9)

 

 Median (IQR)

28 (28–28)

27 (18–28)

 

28 (24–28)

28 (20–28)

 

Total medical cost per hospitalization ($)

  

21,600 (21,500 to 21,700)

  

11,520 (11,300 to 11,700)

 Mean (SD)

16,891 (24,014)

38,489 (39,117)

 

24,910 (29,982)

36,426 (36,0736)

 

 Median (IQR)

10,513 (5741–19,913)

27,831 (15,808–48,673)

 

16,356 (8,685–30,122)

26,144 (14,867–16,040)

 
  1. Data are presented as mean (SD) or median (quartile)
  2. ICU: intensive care unit; CI: confidence interval; SD: standard deviation; IQR: interquartile range; NA: not applicable