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Table 3 Average age of Influenzanet participants and comparison with the national statistics (all p < 10 –5 , except * p = 0.5, †0.01 < p < 0.03, ††0.001 < p < 0.006)

From: The representativeness of a European multi-center network for influenza-like-illness participatory surveillance

Gender Influenzanet country Influenzanet General population
   Years (95% CI) Years
All BE 52.8 (52.3 – 53.3) 42.0
FR 52.0 (51.5 – 52.5) 48.6
IT†† 45.9 (45.0 – 46.9) 44.3
NL 51.6 (51.3 – 51.9) 40.8
PT 44.9 (44.0 – 45.9) 39.7
SE 43.7 (42.8 – 44.5) 41.7
UK 47.0 (46.2 – 47.8) 40.5
Female BE 49.0 (48.3 – 49.7) 43.3
FR 50.8 (50.2 – 51.4) 41.2
IT† 43.7 (42.3 - 45.2) 45.6
NL 49.7 (49.3 – 50.0) 41.6
PT* 42.4 (41.0 – 43.8) 41.9
SE†† 44.3 (43.3 – 45.3) 42.9
UK 45.5 (44.6 – 46.5) 41.5
Male BE 56.0 (55.4 – 56.7) 40.7
FR 54.3 (53.4 – 55.2) 38.2
IT 47.5 (46.3 – 48.8) 43.0
NL 54.3 (53.9 – 54.8) 40.0
PT 47.5 (46.1 – 48.9) 37.6
SE† 42.5 (40.8 – 44.2) 40.6
  UK 49.4 (48.0 – 50.7) 39.4