. 2017 Jul 12;153(7):675–680. doi: 10.1001/jamadermatol.2017.0473

Table 2. Change in Biopsy Specificity by Incorporating PLA Into the Biopsy Decision.

Variable	PLA Use		Absolute Change^a	Relative Change^b	P Value
Variable	Without	With	Absolute Change^a	Relative Change^b	P Value
Specificity, %	32.1	56.9	+24.8	+77.3	<.001
No. of correct biopsy decisions	750	1331	+581	NA	NA
No. of incorrect biopsy decisions	1590	1009	−581	NA	NA

Abbreviations: NA, not applicable; PLA, pigmented lesion assay.

^{^a}

Indicates the arithmetic difference between specificity without and with PLA.

^{^b}

Indicates the absolute change divided by the specificity without PLA.