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Table 2 Socio-demographic, exposure and health characteristics of GrippeNet.fr participants over the 2012/13 to 2017/18 study period and demographic characteristics of the French metropolitan population (Inseea, 2015 data). (For comprehensive results of the representativeness of GrippeNet.fr participants, see ref. [17])

From: Factors associated with influenza-like-illness: a crowdsourced cohort study from 2012/13 to 2017/18

  2012/13–2017/18 study periodb
N = 6992
Metropolitan France general population (Inseea, 2015 data) N = 64,604,773
Sociodemographic characteristics
 Gender (m.d. = 0)
  Female 4258 (61%) 52%
  Male 2734 (39%) 48%
 Age (m.d. = 10)
  [0–5) 109 (2%) 6%
  [5–15) 384 (5%) 12%
  [15–45) 1900 (27%) 37%
  [45–65) 2577 (37%) 26%
  [65–75) 1567 (22%) 10%
  75 445 (6%) 9%
 Household composition (m.d. = 16)
  Living alone 1063 (15%) 36%
  Living with ≥1 child 2435 (35%) 32%
  Living with adults only 3478 (50%) 32%
 Occupation (m.d. = 123)
  Working 3345 (49%) 40%
  Student 774 (11%) 24%
  Unemployed 160 (2%) 10%
  Retired 2321 (34%) 25%
  Stay at home/Sick leave 266 (4%)
 Place of residency (m.d. = 0)
  Urban 5637 (81%) 77%
  Rural 1355 (19%) 23%
Lifestyle
 Use of public transport (m.d. = 0) 1169 (17%)
 Individuals’ contacts (m.d. = 0)
 Contact with patients 728 (10%)
 Contact with elderly 721 (10%)
 Contact with a group of people (≥10) 2268 (32%)
 Contact with children 1788 (26%)
 At least one pet at home (m.d. = 14) 3199 (46%)
Health characteristics
 Influenza vaccination (current season) (m.d. = 6) 2517 (36%)
 Smokers (m.d. = 7) 766 (11%)
 At least one health comorbidityc (m.d. = 0) 1504 (22%)
 Chronic treatment c for: (m.d. = 0)
  Asthma 441 (6%)
  Diabetes 263 (4%)
  Heart diseases 686 (10%)
  Kidney diseases 50 (1%)
  Immunosuppression 210 (3%)
  Pulmonary diseases 195 (3%)
 At least one respiratory allergy (m.d. = 0) 2413 (35%)
 BMI (m.d. = 139)
  Underweight 348 (5%)
  Normal weight 3946 (58%)
  Overweight 1799 (26%)
  Obese 760 (11%)
  1. aThe National Institute of Statistics and Economic Studies (https://www.insee.fr/fr/accueil) collects, analyses and disseminates information on the French economy and society
  2. bParticipants included in the analysis may have participated for the six GrippeNet.fr seasons. An individual may have participated up to six times (one time for each followed year). Here we analyze the participants’ characteristics depending on the last survey completed over the study period
  3. cParticipants receiving a chronic treatment for at least one of the following diseases: asthma, diabetes, immunosuppression, heart, kidney, and pulmonary diseases
  4. m.d. missing data. The number corresponds to the total of missing data for a given variable among the 6992 participants