Table 2

Study inclusion and exclusion criteria by year, 2007-2008

Criteria

2007

2008


Excluded

Included

Excluded

Included


Inclusion

Respiratory swabs of ILI patients submitted by GPs

0

480

0

407

Exclusion

Influenza result unknown

0

480

0

407

Vaccination status unknown

8

472

4

403

Symptom onset to specimen collection interval unknown

41a

434

22a

384

> 4 days between symptom onset and specimen collection

50b

386

54

330


a includes 3 patients with unknown vaccination status

b includes 2 patients with unknown vaccination status

Fielding et al. BMC Infectious Diseases 2011 11:170   doi:10.1186/1471-2334-11-170

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