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Table 6 Logistic regression analysis of determinants for use of garbage codes in Norway 1996–2019

From: Garbage codes in the Norwegian Cause of Death Registry 1996–2019

Explanatory variable

All GC (%)

N = 290,469

All deaths

N = 1,000,128

Single predictor models

Multiple predictor model

OR

(95% CI)

LR stat*

p value

OR

(95% CI)

LR stat*

p value

Year of death

    

1645

<  0.001

  

3644

<  0.001

 1996–1999

52,658 (29.7)

177,043

1 (ref.)

   

1 (ref.)

   

 2000–2004

63,900 (29.8)

214,402

1.00

(0.99–1.02)

  

0.96

(0.95–0.98)

  

 2005–2009

63,257 (30.8)

205,178

1.05

(1.04–1.07)

  

0.96

(0.95–0.98)

  

 2010–2014

59,618 (29.3)

203,647

0.98

(0.96–0.99)

  

0.85

(0.84–0.86)

  

 2015–2019

51,036 (25.5)

199,858

0.81

(0.81–0.82)

  

0.68

(0.67–0.69)

  

Sex

    

5454

<  0.001

  

482

<  0.001

 Female

165,971 (32.3)

513,851

1 (ref.)

   

1 (ref.)

   

 Male

124,498 (25.6)

486,277

0.72

(0.72–0.73)

  

0.90

(0.89–0.91)

  

Age at death

    

48,158

<  0.001

  

30,379

<  0.001

 Under 1

127 (2.98)

4264

1 (ref.)

   

1 (ref.)

   

 1–4

150 (14.6)

1029

5.56

(4.34–7.13)

  

4.57

(3.56–5.86)

  

 5–14

214 (14.7)

1453

5.63

(4.48–7.09)

  

4.44

(3.54–5.60)

  

 15–49

9185 (19.6)

46,910

7.93

(6.67–9.52)

  

5.87

(4.93–7.05)

  

 50–79

73,320 (19.0)

385,304

7.66

(6.45–9.18)

  

5.81

(4.89–6.97)

  

 80–89

122,138 (33.1)

369,224

16.1

(13.6–19.3)

  

11.3

(9.49–13.5)

  

 90–115

85,335 (44.5)

191,944

26.1

(22.0–31.3)

  

17.4

(14.6–20.9)

  

Place of death

    

25,291

<  0.001

  

10,369

<  0.001

 Hospital

74,666 (20.4)

366,855

1 (ref.)

   

1 (ref.)

   

 Nursing home

157,632 (36.3)

434,271

2.23

(2.21–2.25)

  

1.62

(1.60–1.64)

  

 At home

44,238 (29.6)

149,203

1.65

(1.63–1.67)

  

1.76

(1.73–1.78)

  

 Other known

9037 (26.1)

34,620

1.38

(1.35–1.42)

  

1.84

(1.79–1.89)

  

 Unknown

4896 (32.3)

15,179

1.86

(1.80–1.93)

  

2.08

(2.00–2.15)

  

Autopsy

    

9761

<  0.001

  

1828

<  0.001

 No autopsy

276,032 (30.3)

911,192

1 (ref.)

   

1 (ref.)

   

 Non-forensic

5752 (12.3)

46,862

0.32

(0.31–0.33)

  

0.56

(0.55–0.58)

  

 Forensic

8685 (20.6)

42,074

0.60

(0.58–0.61)

  

0.83

(0.81–0.85)

  
  1. Data source: NCoDR
  2. LR stat: Likelihood ratio statistic (−2LogL)