Table 3:

Sensitivity, specificity, positive predictive value and negative predictive value for various PPS cut points (n = 136)

PPS, %^*	Sensitivity	Specificity	Positive predictive value	Negative predictive value	Distance from 1,1
≤ 10	0.015	1.000	1.000	0.504	0.985
≤ 20	0.279	1.000	1.000	0.581	0.721
≤ 30	0.691	0.868	0.839	0.738	0.336
≤ 40	0.897	0.662	0.726	0.865	0.354
≤ 50	1.000	0.324	0.596	1.000	0.676
≤ 60	1.000	0.015	0.504	1.000	0.985
≤ 70	1.000	0.000	0.500	–^†	1.000

↵* PPS = palliative performance scale, a discrete variable ranging from 0% to 100%, by increments of 10, where 0% represents death. None of the patients in this study sample had a PPS over 70%.
↵† Dash represents no actual number (i.e., 0/0).