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Table 4 Factors associated with probability of response to the postal questionnaire among unsuccessfully treated couples ( n= 2,152)

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 1.48 1.15-1.90  
 35-39 1.01 0.78-1.31  
 ≥ 40 0.64 0.47-0.88  
Inclusion center    <0.001
 Marseille 1   
 Bois-Guillaume 1.76 1.32-2.34  
 Sèvres 1.37 0.99-1.88  
 Besançon 1.33 0.93-1.91  
 Caen 2.18 1.58-3.00  
 Cochin 0.88 0.62-1.24  
 Clermont-Ferrand 1.50 1.06-2.12  
 Montsouris 0.96 0.70-1.33  
Year of 1st oocyte retrieval    0.003
 2000 1   
 2001 1.45 1.14-1.83  
 2002 1.44 1.14-1.82  
Origin of infertility    0.14
 Female 1   
 Male 0.85 0.69-1.06  
 Couple 0.80 0.62-1.03  
 Unexplained 1.09 0.81-1.46  
Number of embryos obtained at 1st attempt    0.79
 0-1 1   
 2-5 1.06 0.85-1.32  
 > 5 1.08 0.85-1.38  
Number of attempts    0.008*
 1 1   
 2-4 1.25 1.03-1.53  
 >4 1.44 1.06-1.97  
  1. * P for trend.