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Table 1 Comparison of sample’s characteristics of G-GrippeNet 2014/2015 with national statistics from the 2010 National Perinatal Survey

From: First nationwide web-based surveillance system for influenza-like illness in pregnant women: participation and representativeness of the French G-GrippeNet cohort

  GGNET N (%) National perinatal survey 2010 N (%) p-value
Total 153 15 187  
Age, years    <10 −3
  < 25 1 (1 %) 2444 (17 %)  
 25–29 29 (19 %) 4777 (33 %)  
 30–34 59 (39 %) 4419 (31 %)  
 35–39 51 (34 %) 2255 (16 %)  
  > 39 12 (8 %) 506 (3 %)  
Educational Level    <10 −3
 Middle School or less 3 (2 %) 3974 (28 %)  
 High School 13 (9 %) 2796 (20 %)  
 College or more 135 (89 %) 7290 (52 %)  
Occupational status    <10 −3
 Employed 111 (74 %) 9507 (67 %)  
 Housewife 5 (2 %) 1869 (13 %)  
 Student 1 (1 %) 344 (2 %)  
 Unemployed 14 (9 %) 1711 (12 %)  
 Other 21 (14 %) 718 (5 %)  
Occupation (if employed)    <10 −3
 Professional, manager, intermediate 36 (31 %) 4175 (43 %)  
 Office work 64 (55 %) 2714 (29 %)  
 Services 5 (4 %) 1713 (18 %)  
 Skilled manual work 6 (5 %) 453 (5 %)  
 Other manual work 0 339 (4 %)  
 Other 6 (5 %) 88 (1 %)  
Pregnancy trimester    -
 1st 40 (27 %) -  
 2nd 47 (32 %) -  
 3rd 61 (41 %) -  
Parity    0.45
 0 73 (48 %) 6396 (43 %)  
 1 53 (35 %) 5004 (35 %)  
 2 20 (13 %) 2069 (14 %)  
  > 2 7 (4 %) 1130 (8 %)  
History of hospitalisation during previous pregnancy    -
 No 82 (78 %) -  
 Yes 23 (22 %) -  
Chronic disease    
 No 142 (93 %) - -
 Yes 11 (7 %) -  
  Asthma 7 -  
  Chronic respiratory disease 2 -  
  Chronic cardiac disease 1 -  
  Chronic renal disease 1 -  
  Diabetes 0 -  
  Immunosuppression 1 -  
Body Mass Index before pregnancy    0.25
  < 18.5 11 (7 %) 1126 (8 %)  
 18.5–25 106 (70 %) 8811 (65 %)  
 25–30 26 (17 %) 2360 (17 %)  
  > 30 8 (6 %) 1347 (10 %)  
Current smoker    0.002
 No 142 (93 %) 11,679 (83 %)  
 Yes (1) 11 (7 %) 2403 (17 %)  
  1. (1) at enrollment in GGNET; during the 3rd trimester in the National Perinatal Survey