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Table 2 Frequency of independence between main diagnosis (MD) and underlying cause of death (UCD) according to age, gender, discharge-death time interval, length of stay, number of hospital stays and category of UCD and relative risks (univariate and multivariate analysis)

From: Automated comparison of last hospital main diagnosis and underlying cause of death ICD10 codes, France, 2008–2009

 

In-hospital deaths

 

Out-of-hospital deaths

 

n

Independence

RR

RRa

n

Independence

RR

RRa

 

289 904

    

81 688

   

Age (years)

         

1-14

1 010

5.2%

0.58*

0.57*

 

154

11.7%

0.59*

0.52*

15-34

3 576

4.8%

0.52*

0.55*

 

917

24.9%

1.26*

0.87*

35-64

71 556

7.1%

0.78*

0.87*

 

14 562

21.6%

1.09*

1.10*

65-84

143 413

9.1%

1

1

 

36 314

19.8%

1

1

>84

70 349

9.7%

1.07*

0.97*

 

29 741

22.5%

1.14*

0.96*

Ptrend

  

<.0001

<.0001

   

0.0961

<.0001

Gender

         

Male

158 793

8.8%

1

1

 

39 582

20.8%

1

1

Female

131 111

8.6%

0.98

0.93*

 

42 106

21.5%

1.03*

0.98

Discharge-death time interval (months)

        

[0-1]

     

34 678

15.1%

1

1

[1-3]

     

17 548

20.6%

1.36*

1.31*

[3-6]

     

17 691

26.8%

1.77*

1.53*

[6-12]

     

11 771

31.0%

2.05*

1.62*

Ptrend

       

<.0001

<.0001

Length of last stay (days)

         

[0-1]

22 622

3.9%

0.39*

0.33*

 

8 677

23.5%

1.21*

1.19*

[13]

73 259

6.8%

0.67*

0.60*

 

15 722

23.2%

1.19*

1.09*

[49]

73 751

9.2%

0.92*

0.87*

 

20 983

22.0%

1.13*

1.06*

[1029]

89 435

10.1%

1

1

 

30 028

19.4%

1

 

>30

30 837

11.4%

1.13*

1.16*

 

6 278

17.9%

0.92*

0.98

Ptrend

  

<.0001

<.0001

   

<.0001

<.0001

Number of hospital stays within the year before death

      

1

96 470

8.6%

0.96*

0.90*

 

31 150

23.5%

1.30*

1.08*

2-3

105 464

9.0%

1

1

 

30 037

23.2%

1

1

4-5

46 523

8.8%

0.98

1.08*

 

11 522

22.0%

0.81*

0.96

>6

41 447

8.0%

0.89*

1.12*

 

8 979

19.4%

0.72*

1.03

Ptrend

  

<.0001

<.0001

   

<.0001

<.0001

Category of UCD

         

Neoplasms

122 824

5.4%

1

1

 

29 807

9.8%

1

1

Neuro-sensorial disease

9 456

11.3%

2.11*

2.33*

 

5 900

25.0%

2.55*

2.33*

Circulatory disease

71 702

10.1%

1.88*

2.21*

 

21 872

27.9%

2.84*

2.71*

Respiratory disease

19 894

9.3%

1.74*

1.93*

 

4 067

23.2%

2.36*

2.28*

Digestive disease

19 796

11.7%

2.18*

2.51*

 

2 470

29.1%

2.97*

2.85*

External causes

13 126

9.4%

1.74*

2.32*

 

5 453

30.7%

3.12*

2.71*

Other

33 106

14.9%

2.78*

3.15*

 

12 119

28.2%

2.88*

2.68*

  1. non-informative UCD excluded.
  2. RRa: adjusted for age. sex. length of stay. number of stays during last year of life. and category of UCD.
  3. *p < 0.05.