Table 4.

Predictive accuracy of the psoas muscle index and psoas muscle density for all-cause mortality.

Variables	C-index	p-value	NRI	p-value	IDI	p-value
All-cause mortality
Established risk factorsa	0.775 (0.705–0.845)		Reference			Reference
+ PMI	0.836 (0.773–0.900)	0.0095	0.922	< 0.00001	0.140	< 0.00001
+ PMD	0.877 (0.826–0.929)	0.0005	1.159	< 0.00001	0.199	< 0.00001
+ PMI and PMD	0.893 (0.843–0.942)	< 0.00001	1.058	< 0.00001	0.255	< 0.00001

NRI net reclassification improvement, IDI integrated discrimination improvement, PMI psoas muscle index, PMD psoas muscle density.

^aGender and age, history of cardiovascular disease, geriatric nutritional risk index, simplified creatinine index, and log of C-reactive protein level.