Table 1: Epidemiological data of patients with A(H1N1)pdm09 virus infection.

Variables

Influenza Season

odds ratio

p-value

2009/10                2012/13

Male sex

30 (51)

7 (47)

1.0 (0.6-2.0)

> 0.05

Age, y

6.5

2.1

 

< 0.01

-       < 1 y

-       1-5 y

-       5-10 y

-       10-15 y

-       > 15 y

5 (8)

26 (44)

9 (15)

18 (31)

1 (2)

3 (20)

11 (73)

1 (7)

0

0

0.4 (0.1-1.6)

0.6 (0.4-0.9)

2.3 (0.3-16.7)

 

> 0.05

< 0.05

> 0.05

 

In-house admissions

59 (48)

15 (65)

 

> 0.05

Hospital length of stay, d

5.1

10.8

 

< 0.01

PICU treatment

2 (3)

2 (13)

0.3 (0.04-1.7)

> 0.05

Underlying chronical medical conditions

 

 

> 0.05

None

40 (68)

12 (80)

0.8 (0.6-1.2)

> 0.05

Respiratory disease

3 (5)

1 (7)

0.8 (0.1-6.8)

> 0.05

Metabolic defect

0

1 (7)

 

 

Cardiac disease

3 (5)

1 (7)

0.8 (0.1-6.8)

> 0.05

Neurodevelopment disorder

5 (9)

0

 

 

Hematooncology disease

8 (14)

0

 

 

 

Values are absolute numbers (and % of the respective collective), except as indicated. d: Days, PICU: Pediatric Intensive Care Unit, y: Year.