title: First nationwide web-based surveillance system for influenza-like illness in pregnant women: participation and representativeness of the French G-GrippeNet cohort.
abstract: BACKGROUND
  Pregnancy is a risk factor for severe influenza resulting in increased risks of hospitalisation and death in mothers and their new-borns. Our objective was to assess the representativeness and participation of French women to a new web-based collaborative tool for data collection and monitoring of Influenza Like Illness (ILI) during pregnancy.
  
  
  METHODS
  During the 2014/2015 influenza season, pregnant women living in metropolitan France were enrolled through a web platform ( https://www.grippenet.fr/). Then throughout the season, participants were asked to report, on a weekly basis, if they had experienced symptoms of ILI. Representativeness was assessed by comparing the characteristics of participants to those of the French National Perinatal Survey. For each participant, the participation rate was the number of weekly questionnaires completed, divided by the length of follow-up (in weeks). Predictors of active participation (participation rate >15%) were assessed by multivariate logistic regression.
  
  
  RESULTS
  A total of 153 women were enrolled. Participants were older (mean age 34 years vs. 29 years) and more highly educated (high school level 89% versus 52%) than the general population of pregnant women in France, but the sample did not differ on pregnancy-related characteristics (parity, history of hospitalisation during a previous pregnancy). The median rate of participation was high (78%, interquartile range: 34-96). Higher educational level and participation to a previous GrippeNet.fr season were associated with active participation.
  
  
  CONCLUSIONS
  Despite small sample size and lack of representativeness, the retention rate was high, suggesting that pregnant women are prone to adhere to a longitudinal follow-up of their health status via the Internet.
authors.affiliation: Sorbonne Universités, UPMC Univ Paris 06, INSERM, Institut Pierre Louis d'épidémiologie et de Santé Publique (IPLESP UMRS 1136), F75012, Paris, France.|Department of Infectious diseases, CIC Cochin-Pasteur, Cochin Broca Hôtel-Dieu hospital, Assistance Publique-Hôpitaux de Paris (AP-HP), Paris, France.
authors.forename: Paul
authors.initials: P
authors.lastname: Loubet
authors.affiliation: Sorbonne Universités, UPMC Univ Paris 06, INSERM, Institut Pierre Louis d'épidémiologie et de Santé Publique (IPLESP UMRS 1136), F75012, Paris, France.
authors.forename: Caroline
authors.initials: C
authors.lastname: Guerrisi
authors.affiliation: Sorbonne Universités, UPMC Univ Paris 06, INSERM, Institut Pierre Louis d'épidémiologie et de Santé Publique (IPLESP UMRS 1136), F75012, Paris, France.
authors.forename: Clément
authors.initials: C
authors.lastname: Turbelin
authors.affiliation: INSERM U 1153, Obstetrical, Perinatal and Pediatric Epidemiology Research Team (EPOPé), Center for Epidemiology and Statistics Sorbonne Paris Cité, DHU Risks in pregnancy, Paris Descartes University, Paris, France.
authors.forename: Béatrice
authors.initials: B
authors.lastname: Blondel
authors.affiliation: Department of Infectious diseases, CIC Cochin-Pasteur, Cochin Broca Hôtel-Dieu hospital, Assistance Publique-Hôpitaux de Paris (AP-HP), Paris, France.|INSERM U 1153, Obstetrical, Perinatal and Pediatric Epidemiology Research Team (EPOPé), Center for Epidemiology and Statistics Sorbonne Paris Cité, DHU Risks in pregnancy, Paris Descartes University, Paris, France.|INSERM CIC 1417, Paris, France.|Inserm, F-CRIN, Innovative clinical research network in vaccinology (I-REIVAC), Paris, France.
authors.forename: Odile
authors.initials: O
authors.lastname: Launay
authors.affiliation: Clinical Investigation Center (CIC) INSERM 1432, Gynecology and Obstetrics CIC Network (GO-CIC) & Hepato-gastroenterology department, Dijon Hospital, Dijon, France.
authors.forename: Marc
authors.initials: M
authors.lastname: Bardou
authors.affiliation: Sorbonne Universités, UPMC Univ Paris 06, INSERM, Institut Pierre Louis d'épidémiologie et de Santé Publique (IPLESP UMRS 1136), F75012, Paris, France.
authors.forename: Thierry
authors.initials: T
authors.lastname: Blanchon
authors.affiliation: Department of Infectious Diseases, Institut de Veille Sanitaire (InVS), St Maurice, France.
authors.forename: Isabelle
authors.initials: I
authors.lastname: Bonmarin
authors.affiliation: INSERM U 1153, Obstetrical, Perinatal and Pediatric Epidemiology Research Team (EPOPé), Center for Epidemiology and Statistics Sorbonne Paris Cité, DHU Risks in pregnancy, Paris Descartes University, Paris, France.|Department of Obstetrics and Gynecology, Cochin Broca Hôtel-Dieu hospital, Assistance Publique-Hôpitaux de Paris (AP-HP), Paris, France.
authors.forename: François
authors.initials: F
authors.lastname: Goffinet
authors.affiliation: INSERM U 1153, Obstetrical, Perinatal and Pediatric Epidemiology Research Team (EPOPé), Center for Epidemiology and Statistics Sorbonne Paris Cité, DHU Risks in pregnancy, Paris Descartes University, Paris, France.
authors.forename: Pierre-Yves
authors.initials: PY
authors.lastname: Ancel
authors.affiliation: Sorbonne Universités, UPMC Univ Paris 06, INSERM, Institut Pierre Louis d'épidémiologie et de Santé Publique (IPLESP UMRS 1136), F75012, Paris, France.
authors.forename: Vittoria
authors.initials: V
authors.lastname: Colizza
authors.affiliation: Sorbonne Universités, UPMC Univ Paris 06, INSERM, Institut Pierre Louis d'épidémiologie et de Santé Publique (IPLESP UMRS 1136), F75012, Paris, France.
authors.forename: Thomas
authors.initials: T
authors.lastname: Hanslik
authors.affiliation: Department of Infectious diseases, CIC Cochin-Pasteur, Cochin Broca Hôtel-Dieu hospital, Assistance Publique-Hôpitaux de Paris (AP-HP), Paris, France. solen.kerneis@aphp.fr.|INSERM U 1153, Obstetrical, Perinatal and Pediatric Epidemiology Research Team (EPOPé), Center for Epidemiology and Statistics Sorbonne Paris Cité, DHU Risks in pregnancy, Paris Descartes University, Paris, France. solen.kerneis@aphp.fr.|INSERM CIC 1417, Paris, France. solen.kerneis@aphp.fr.
authors.forename: Solen
authors.initials: S
authors.lastname: Kernéis
mesh_terms: D000328:Adult; D005260:Female; D005602:France / Q000453:epidemiology; D006304:Health Status; D006306:Health Surveys; D006801:Humans; D007251:Influenza, Human / Q000453:epidemiology*; D020407:Internet; D007802:Language; D011247:Pregnancy; D062486:Public Health Surveillance / Q000379:methods*; D012307:Risk Factors; D012621:Seasons; D012959:Socioeconomic Factors; D055815:Young Adult
keywords: Incidence; Influenza; Pregnancy; Surveillance; Web-based study