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Table 1 Age- and sex-stratified frequency and weekly incidence of norovirus case reports § during calendar weeks 21–30 - Comparison of season 2010/2011 with seasons 2003/2004 through 2009/2010 and 2011/2012, Germany

From: Estimating the under-reporting of norovirus illness in Germany utilizing enhanced awareness of diarrhoea during a large outbreak of Shiga toxin-producing E. coli O104:H4 in 2011 – a time series analysis

 

Both sexes

Males

Females

 

Cumulative case number

Average weekly incidence W21-W30 [cases/100,000 population]

Cumulative case number

Average weekly incidence W21-W30 [cases/100,000 population]

Cumulative case number

Average weekly incidence W21-W30 [cases/100,000 population]

 

W21-W30

   

W21-W30

   

W21-W30

   

Age [years]

O104– outbreak season* [n]

Non-outbreak seasons** [Median (range)]

O104– outbreak season* [n]

Non-outbreak seasons** [Median (range)]

Under-reporting factor

O104– outbreak season* [n]

Non- outbreak seasons** [Median (range)]

O104– outbreak season* [n]

Non-outbreak seasons** [Median (range)]

Under-reporting factor

O104– outbreak season* [n]

Non-outbreak seasons** [Median (range)]

O104– outbreak season* [n]

Non-outbreak seasons** [Median (range)]

Under-reporting factor

0-9

2,695

1,493 (861–1,955)

3.86

2.12 (1.16-2.73)

1.82

1,441

820 (475–1,035)

4.03

2.28 (1.25-2.82)

1.77

1,254

660.5 (386–920)

3.69

1.93 (1.07-2.64)

1.92

10-19

841

321.5 (154–462)

1.04

0.38 (0.18-0.57)

2.76

419

161.5 (75–252)

1.01

0.36 (0.17-0.61)

2.78

422

157 (79–214)

1.07

0.37 (0.18-0.54)

2.93

20-29

1,380

407 (209–637)

1.39

0.41 (0.21-0.64)

3.37

604

178 (92–273)

1.19

0.36 (0.19-0.54)

3.36

776

222.5 (117–365)

1.59

0.46 (0.24-0.75)

3.48

30-39

1,046

357 (209–471)

1.07

0.35 (0.19-0.47)

3.03

467

164.5 (71–217)

0.94

0.31 (0.12-0.43)

3.00

579

189 (138–255)

1.20

0.38 (0.24-0.53)

3.16

40-49

1,187

453.5 (236–674)

0.86

0.33 (0.18-0.49)

2.65

528

211 (87–319)

0.75

0.30 (0.13-0.46)

2.54

659

240.5 (149–355)

0.98

0.35 (0.22-0.53)

2.77

50-59

1,248

419 (200–738)

1.07

0.37 (0.19-0.63)

2.88

564

186.5 (83–359)

0.96

0.33 (0.17-0.61)

2.90

684

225.5 (109–379)

1.17

0.40 (0.20-0.65)

2.95

60-69

1,038

460 (227–701)

1.15

0.50 (0.23-0.78)

2.31

493

219 (96–336)

1.12

0.49 (0.19-0.77)

2.31

545

234.5 (124–365)

1.17

0.50 (0.25-0.79)

2.35

70+

3,153

1,504 (564–2,498)

2.53

1.28 (0.55-2.00)

1.98

1,252

527 (172–957)

2.46

1.12 (0.45-1.88)

2.20

1,901

977 (392–1,541)

2.58

1.38 (0.61-2.09)

1.86

All

12,588

5,584 (2,915-7,798)

1.54

0.68 (0.35-0.95)

2.26

5,768

2,567 (1,277-3,557)

1.44

0.64 (0.32-0.89)

2.25

6,820

3,017 (1,638-4,241)

1.64

0.72 (0.39-1.02)

2.27

  1. Note. W calendar week; CI confidence interval; * season 2010/2011, in which a large outbreak of Shiga toxin-producing E. coli O104:H4 occurred; ** seasons 2003/2004 through 2009/2010 and 2011/2012.
  2. §Laboratory-confirmed cases.