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

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

					Cohen’s kappa Κ (95% CI)	Sensitivity (95% CI)	Specificity (95% CI)
Compared to self-report at IVF study^a
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

ART-FS AfteR Treatment Follow-up Study, IVF in vitro fertilization, 95% CI 95% confidence interval
^a Self-report at IVF Study enrollment used as gold standard to calculate specificity and sensitivity

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