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Table 2 Fertility treatment usage before IVF Study reported at ART-FS compared to self-report at IVF Study

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)
Compared to self-report at IVF studya
 Use of IVF ART-FS recall 0.28 (0.22, 0.33) 0.85 (0.79, 0.92) 0.63 (0.59, 0.67)
IVF Study recall   +
+ 94 16
222 382
 Use of Clomiphene or Gonadotropin ART-FS recall 0.36 (0.28, 0.42) 0.81 (0.78, 0.84) 0.55 (0.48, 0.61)
IVF Study recall   +
+ 463 109
107 129
 Use of any fertility treatment ART-FS recall 0.36 (0.29, 0.43) 0.85 (0.80, 0.86) 0.52 (0.45, 0.58)
IVF Study recall   +
+ 491 97
106 114
  1. ART-FS AfteR Treatment Follow-up Study, IVF in vitro fertilization, 95% CI 95% confidence interval
  2. a Self-report at IVF Study enrollment used as gold standard to calculate specificity and sensitivity
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