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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.