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Table 3 Factors associated with probability of contact in the study among unsuccessfully treated couples (n = 3,597)

From: Who does not participate in a follow-up postal study? a survey of infertile couples treated by in vitro fertilization

  Multivariate analysis
  OR 95% CI P
Woman’s age (years)    <0.001*
 < 30 1   
 30-34 1.46 1.21-1.77  
 35-39 1.50 1.23-1.83  
 ≥ 40 1.69 1.33-2.15  
Inclusion center    <0.001
 Marseille 1   
 Bois-Guillaume 0.79 0.63-0.97  
 Sèvres 1.06 0.83-1.37  
 Besançon 0.99 0.76-1.30  
 Caen 1.83 1.40-2.41  
 Cochin 1.07 0.82-1.39  
 Clermont-Ferrand 1.18 0.89-1.56  
 Montsouris 1.56 1.18-2.05  
Year of 1st oocyte retrieval    <0.001*
 2000 1   
 2001 1.13 0.94-1.35  
 2002 1.43 1.19-1.72  
Origin of infertility    0.206
 Female 1   
 Male 1.03 0.97-1.23  
 Couple 0.90 0.74-1.09  
 Unexplained 0.83 0.67-1.04  
Number of embryos obtained at 1st attempt    0.009*
 0-1 1   
 2-5 1.10 0.93-1.31  
 > 5 1.29 1.06-1.55  
Number of attempts    <0.001*
 1 1   
 2-4 1.59 1.37-1.84  
 >4 3.76 2.78-5.08  
  1. * P for trend.