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Table 2 General characteristics of study patients with Influenza-associated hospitalization in Germany, January 2010 - December 2019

From: Epidemiology and direct healthcare costs of Influenza-associated hospitalizations – nationwide inpatient data (Germany 2010-2019)

 

Age, years

 

All

<18

18-59

>59

p-value a

All cases, N (%)

156,097 (100)

47,982 (100)

34,829 (100)

73,286 (100)

 

Age, median (IQR)

56 (9; 77)

3 (1; 7)

46 (33; 54)

78 (70; 84)

<0.001

Age, mean (±SD)

47.2 (± 32.5)

4.8 (± 4.8)

42.9 (± 12.2)

77.1 (± 8.9)

<0.001

Sex

    

Female, N (%)

75,609 (48.4)

21,752 (45.3)

16,868 (48.4)

36,989 (50.5)

<0.001

Selected Risk Factors, N(%)

    

Pregnancy

423 (0.3)

7 (0.0)

416 (1.2)

0 (0.0)

<0.001

Diabetes

23,465 (15.0)

148 (0.3)

3,046 (8.7)

20,271 (27.7)

<0.001

Adiposity

5,089 (3.3)

197 (0.4)

1,755 (5.0)

3,137 (4.3)

<0.001

Immune disorder

8,791 (5.6)

582 (1.2)

2,875 (8.3)

5,334 (7.3)

<0.001

Influenza-associated ICD-10-GM codes, N(%)

    

Influenza due to identified zoonotic or pandemic

Influenza virus (J09)

25,226 (16.2)

8,443 (17.6)

7,947 (22.8)

8,836 (12.1)

<0.001

Influenza due to identified seasonal Influenza

virus (J10)

131,989 (84.6)

39,879 (83.1)

27,217 (78.1)

64,893 (88.5)

<0.001

Influenza with pneumonia, seasonal Influenza

virus identified (J10.0)

37,811 (24.2)

6,691 (13.9)

6,885 (19.8)

24,235 (33.1)

<0.001

Influenza with other respiratory manifestations,

seasonal Influenza virus identified (J10.1)

79,765 (51.1)

27,953 (58.3)

16,936 (48.6)

34,876 (47.6)

<0.001

Influenza with other manifestations, seasonal

Influenza virus identified (J10.8)

15,516 (9.9)

5,477 (11.4)

3,588 (10.3)

6,451 (8.8)

<0.001

Influenza, virus not identified (J11)b

889 (0.6)

225 (0.5)

243 (0.7)

421 (0.6)

<0.001

Influenza with pneumonia, seasonal Iinfluenza

virus not identified (J11.0)b

176 (0.1)

35 (0.1)

59 (0.2)

82 (0.1)

<0.001

Influenza with other respiratory manifestations,

seasonal Influenza virus not identified (J11.1)b

611 (0.4)

151 (0.3)

159 (0.5)

301 (0.4)

0.003

Influenza with other manifestations, seasonal

Influenza virus not identified (J11.8)b

107 (0.1)

40 (0.1)

27 (0.1)

40 (0.1)

0.133

Influenza A/H1N1 pandemic 2009 (U69.20)b

8,160 (5.2)

2,835 (5.9)

3,219 (9.2)

2,106 (2.9)

<0.001

Selected Complications, N(%)

    

Bronchitis, Influenza

5,982 (3.8)

1,575 (3.3)

1,272 (3.7)

3,135 (4.3)

<0.001

Pneumonia, Influenza

37,898 (24.3)

6,712 (14.0)

6,926 (19.9)

24,260 (33.1)

<0.001

Pneumonia, other viral

476 (0.3)

186 (0.4)

126 (0.4)

164 (0.2)

<0.001

Pneumonia, bacterial

9,773 (6.3)

1,277 (2.7)

2,551 (7.3)

5,945 (8.1)

<0.001

Myocarditis

383 (0.2)

57 (0.1)

173 (0.5)

153 (0.2)

<0.001

Encephalitis

224 (0.1)

104 (0.2)

65 (0.2)

55 (0.1)

<0.001

ARDS

1,889 (1.2)

92 (0.2)

1,004 (2.9)

793 (1.1)

<0.001

Sepsis

3,590 (2.3)

112 (0.2)

1,133 (3.3)

2,345 (3.2)

<0.001

Otitis Media

2,909 (1.9)

2,644 (5.5)

160 (0.5)

105 (0.1)

<0.001

Treatment/Outcome, N(%)

    

Intensive care

9,513 (6.1)

746 (1.6)

2,918 (8.4)

5,849 (8.0)

<0.001

ECMO

540 (0.3)

19 (0.0)

361 (1.0)

160 (0.2)

<0.001

Pre-ECMO

36 (0.0)

XXX

XXX

XXX

 

PECLA

49 (0.0)

XXX

XXX

XXX

 

Minimized heart-lung machine

50 (0.0)

XXX

XXX

XXX

 

Veno-venous extracorporeal CO2 removal

5 (0.0)

XXX

XXX

XXX

 

Fatality

5,411 (3.5)

86 (0.2)

625 (1.8)

4,700 (6.4)

<0.001

Hospital stay in days, median (IQR)

5 (3; 7)

3 (2; 4)

4 (2; 4)

7 (4; 10)

<0.001

  1. Data are N (percent) or median (quartiles), unless otherwise specified. Cases were assigned to study years (January - December) by date of hospital discharge. Sex is unknown for 5 of 156,097 persons and these persons were included as female. ICD-10-GM codes are either primary diagnosis (PD) or secondary diagnosis (SD); multiple nominations of influenza codes per patient are possible. If at least one age group contained less than 3 patients, data was removed for patient data protection and marked XXX. ARDS: Acute respiratory distress syndrome. ECMO: Extracorporeal membrane oxygenation. PECLA: Pumpless arterio-venous extracorporeal lung assist. aKruskal-Wallis or Mann-Whitney test. bIn the present analyses, any diagnoses J11 or U69.20 were only recorded as secondary diagnoses.