Table 2.

Sensitivity and false positive fraction of the administrative nomenclature codes for tetralogy of Fallot, transposition of the great arteries, and hypoplastic left heart syndrome, using the clinical nomenclature codes as the referent.

Aggregate cardiac defect group			Sensitivity†	False Positive Fraction‡
Tetralogy of Fallot			275/330 (0.83)	5/280 (0.02)
	Clinical code +	Clinical code −
Administrative code +	275	5
Administrative code −	55	---
Transposition of the great arteries			163/163 (1.00)	154/317 (0.49)
	Clinical code +	Clinical code −
Administrative code +	163	154
Administrative code −	0	---
Hypoplastic left heart syndrome			170/179 (0.95)	22/192 (0.11)
	Clinical code +	Clinical code −
Administrative code +	170	22
Administrative code −	9	---

^†Sensitivity is the probability that a case has an appropriate administrative nomenclature code given the presence of the clinical nomenclature code for that diagnosis.

^‡False Positive Fraction is the probability that a case does not have the clinical nomenclature code given the presence of the administrative nomenclature code ICD for that diagnosis.