Table 2.

Top 15 features ranked by the average ranking of feature importance and absolute feature weight of lasso regression

Male							Female
Feature	IRFa	RIRFb	AFWLc	RAFWLd	ARe	P	Feature	IRF	RIRF	AFWL	RAFWL	AR	P
6-m walk	0.1987	1	1.1335	1	1	< 0.001	HGS	0.1440	1	1.1379	1	1	< 0.001
HGS	0.1470	2	1.0320	2	2	< 0.001	6-m walk	0.1233	2	0.6048	2	2	< 0.001
age	0.0600	3	0.5118	3	3	< 0.001	AWVA	0.0241	3	0.4042	3	3	< 0.001
FBG	0.0236	4	0	9	6.5	0.007	TBIL	0.0229	4	0	9	6.5	0.048
PTH	0.0220	5	0	9	7	0.001	TP	0.0186	5	0	9	7	0.23
pre-CRE	0.0217	6	0	9	7.5	< 0.001	TG	0.0177	6	0	9	7.5	0.459
AG	0.0197	7	0	9	8	0.192	AST/ALT	0.0169	7	0	9	8	0.125
post-CRE	0.0188	8	0	9	8.5	< 0.001	SMI	0.0154	8	0	9	8.5	0.004
AST	0.0137	10	0	9	9.5	0.002	CysC	0.0144	9	0	9	9	0.142
LY%	0.0125	11	0	9	10	0.063	WC	0.0140	10	0	9	9.5	0.098
TP	0.0115	12	0	9	10.5	0.33	post-CRE	0.0134	11	0	9	10	0.009
RDW-CV	0.0110	13	0	9	11	0.21	age	0.0132	12	0	9	10.5	0.001
CysC	0.0107	14	0	9	11.5	0.454	s-Fe	0.0129	13	0	9	11	0.244
height	0.0105	15	0	9	12	0.017	weight	0.0127	14	0	9	11.5	0.107
s-Mg	0.0103	16	0	9	12.5	0.478	pre-CRE	0.0126	15	0	9	12	0.01

HGS Handgrip strength, FBG Fasting blood glucose, PTH Parathyroid hormone, pre-CRE Pre-dialysis creatinine, AG Anion gap, post-CRE Post-dialysis creatinine, AST Aspartate aminotransferase, LY% Lymphocyte percentage, TP Total protein, RDW-CV Red blood cell distribution width—coefficient of variation, CysC Cystatin C, s-Mg Serum magnesium, AWVA Arm without vascular access, WC Waist circumference, TBIL Total bilirubin, TG Triglyceride, AST/ALT Aspartate aminotransferase/alanine aminotransferase, SMI Skeletal muscle index, s-Fe Serum ferritin

^aImportance value calculated by RF

^bRanking of importance value calculated by RF

^cAbsolute feature weight of lasso regression

^dRanking of absolute feature weight of lasso regression

^eAverage ranking