. Author manuscript; available in PMC: 2014 Sep 1.

Published in final edited form as: Acad Radiol. 2013 Sep;20(9):10.1016/j.acra.2013.04.013. doi: 10.1016/j.acra.2013.04.013

Table 3.

Fisher probability analysis of the correlation of response to treatment at six months with the pretreatment tumor PME/NTP and IPI using the maximum of the Youden index for comparative purposes (left and middle truth tables, respectively) and the pretreatment tumor PME/NTP using the cutoff for maximum sensitivity (right truth table)

		treatment response					treatment response					treatment response
PME/NTP		CR¹	PR	total	IPI		CR	PR	total	PME/NTP		CR	PR	total
	≤ 1.92	12	1	13		≤ 2.0	11	3	14		≤ 2.2	13	2	15
	> 1.92	1	6	7		> 2.0	2	4	6		> 2.2	0	5	5
	total	13	7	20		total	13	7	20		total	13	7	20
accuracy = 0.90					accuracy = 0.75					accuracy = 0.90
prevalence = 0.65					prevalence = 0.65					prevalence = 0.65
sensitivity = 0.92					sensitivity = 0.85					sensitivity = 1.00
specificity = 0.86					specificity = 0.57					specificity = 0.71
false negative rate = 0.08					false negative rate = 0.15					false negative rate = 0.00
false positive rate = 0.14					false positive rate = 0.43					false positive rate = 0.29
positive predictive value = 0.92					positive predictive value = 0.79					positive predictive value = 0.87
negative predictive value = 0.86					negative predictive value = 0.86					negative predictive value = 1.00
p < 0.001					p < 0.07					p < 0.001

Abbreviations: CR, complete response; PR, partial response