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Table 3 IVF usage during IVF Study reported at ART-FS compared to clinical recordsa

From: Self-reported infertility diagnoses and treatment history approximately 20 years after fertility treatment initiation

   Cohen’s kappa Κ (95% CI) Sensitivity (95% CI) Specificity (95% CI)
Type of transfer
 Fresh IVF cycles ART-FS recall 0.03 (−0.02, 0.08) 0.88 (0.86, 0.90) 0.27 (0.01, 0.54)
Clinical records   +
+ 700 97
8 3
 Frozen IVF cycles ART-FS recall 0.22 (0.15, 0.29) 0.56 (0.49, 0.64) 0.71 (0.68, 0.75)
Clinical records   +
+ 92 71
186 459
   Weighted Cohen’s kappa Κ (95% CI)   
Number of IVF cycles
 All (fresh and frozen) (0–6+) 0.50 (0.45, 0.55)   
 Fresh (0–6+) 0.50 (0.45, 0.55)   
 Frozen (0–6+) 0.40 (0.32, 0.49)   
  1. ART-FS AfteR Treatment Follow-up Study, IVF in vitro fertilization, 95% CI 95% confidence interval
  2. a Clinical records used as gold standard to calculate specificity and sensitivity
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