Table 5.

Association between percentage change in FLC^* and urine protein in patients with abnormal baseline FLC^† by baseline renal function status: Spearman correlation coefficient (P)

	Urine M-spike			Urine total protein
	Overall population	Normal renal function	Abnormal renal function	Overall population	Normal renal function	Abnormal renal function
Urine-only patients plus serum and urine patients, n	101	81	20	148	119	29
iFLC	.60 (<.001)	.67 (<.001)	.55 (.01)	.48 (<.001)	.48 (<.001)	.62 (<.001)
dFLC	.60 (<.001)	.66 (<.001)	.61 (.004)	.46 (<.001)	.47 (<.001)	.55 (.002)
rFLC	.40 (.001)	.43 (<.001)	.27 (.3)	.32 (.003)	.30 (.001)	.42 (.003)
Urine-only patients, n	32	26	6	37	32	5
iFLC	.58 (<.001)	.69 (.001)	.49 (.3)	.51 (.001)	.54 (.002)	.70 (.2)
dFLC	.58 (<.001)	.69 (.001)	.49 (.3)	.51 (.001)	.54 (.001)	.70 (.2)
rFLC	.54 (.002)	.61 (.001)	.31 (.5)	.55 (<.001)	.54 (.001)	.70 (.2)
Serum and urine patients, n	69	55	14	111	87	24
iFLC	.62 (<.001)	.65 (<.001)	.58 (.03)	.49 (<.001)	.48 (<.001)	.62 (.001)
dFLC	.62 (<.001)	.64 (<.001)	.62 (.02)	.49 (<.001)	.46 (<.001)	.53 (.007)
rFLC	.37 (.002)	.38 (.004)	.28 (.3)	.28 (.003)	.25 (.02)	.37 (.08)

Data are correlation coefficients (P) except where shown.

^*Percent change = (2-month − baseline)/baseline.

^†Abnormal ratio and dFLC ≥ 5 mg/dL.