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Table 1 Characteristics of study population at the first aspiration ( N= 3,002)

From: Joint modeling of success and treatment discontinuation in in vitrofertilization programs: a retrospective cohort study

  Parisian center (Cochin) Medium-sized city center (Clermont-Ferrand) P*
  n=1,556 (%) n=1,446 (%)  
Patient age (years)    <0.001
  17-24 2 3  
  25-29 21 27  
  30-34 39 41  
  35-39 29 23  
  ≥ 40 9 6  
Technique    <0.001
  IVF 48 61  
  ICSI 52 39  
Oocytes retrieved    0.054
  0 1 2  
  1-6 34 35  
  7-15 50 47  
  16-60 15 16  
Fresh embryos transferred    <0.001
  0 13 13  
  1 10 13  
  2 65 52  
  3-5 12 22  
Embryos frozen    <0.001
  0 49 70  
  1-2 21 13  
  3-21 30 18  
  1. * p-value for the chi2 test comparing the women’s characteristics according to inclusion center.