Table 3. Measured versus Self-Reported Physical Function.

SF-36 (Physical Function) versus Six minute walk
	Reported function	Measure function		Sensitivity1	Specificity1	Accuracy	+ Predictive Value	Kappa (95% CI)
		Poor	Good
Overall	Poor	65	186	0.59	0.89	0.87	0.26	0.30 (0.23-0.36)
	Good	46	1481
Females	Poor	34	104	0.58	0.88	0.86	0.25	0.28 (0.19-0.37)
	Good	25	740
Males	Poor	31	82	0.60	0.90	0.88	0.27	0.32 (0.22-0.42)
	Good	21	741
Bone Cancer	Poor	11	13	0.55	0.88	0.83	0.46	0.40 (0.19-0.60)
	Good	9	95
CNS tumorˆ	Poor	11	20	0.85	0.84	0.84	0.35	0.43 (0.24-0.61)
	Good	2	108
Leukemia	Poor	17	73	0.46	0.90	0.88	0.19	0.22 (0.11-0.32)
	Good	20	695
Lymphoma	Poor	10	48	0.50	0.84	0.82	0.17	0.18 (0.05-0.31)
	Good	10	253
Other Cancer	Poor	16	32	0.76	0.91	0.90	0.33	0.42 (0.27-0.57)
	Good	5	330
SF-36 (Physical Function) versus PPT
Overall	Poor	34	217	0.69	0.87	0.87	0.14	0.19 (0.13-0.25)
	Good	15	1512
Females	Poor	19	119	0.76	0.86	0.86	0.14	0.20 (0.11-0.28)
	Good	6	759
Males	Poor	15	98	0.63	0.88	0.88	0.13	0.18 (0.09-0.27)
	Good	9	753
Bone Cancer	Poor	2	22	0.67	0.82	0.80	0.08	0.11 (-0.05-0.27)
	Good	1	103
CNS tumorˆ	Poor	12	19	0.67	0.85	0.82	0.39	0.39 (0.20-0.58)
	Good	6	104
Leukemia	Poor	12	78	0.80	0.90	0.90	0.13	0.20 (0.10-0.30)
	Good	3	712
Lymphoma	Poor	3	55	0.75	0.83	0.83	0.05	0.08 (-0.01-0.16)
	Good	1	262
Other Cancer	Poor	5	43	0.56	0.89	0.88	0.10	0.14 (0.01-0.27)
	Good	4	331

¹Sensitivity and specificity assume the PPT and 6MW are gold standard.

^ˆCentral nervous system tumor