Table 3.

A Comparison of FLC-Diff Levels in Patients With AL Amyloidosis Compared With Controls

FLC-Diff (mg/L)/No. of Years Before Diagnosis	Cases (patients with AL)		Controls		McNemar Exact P
	No.	%	No.	%
> 8	20/20	100	0/20	0	< .001
All years
< 4 years	13/13	100	0/13	0	< .001
4-11 years	13/15	87	0/15	0	< .001
> 11 years	6/12	50	0/12	0	< .03
> 23	17/20	85	0/20	0	< .001
All years
< 4 years	12/13	92	0/13	0	< .001
4-11 years	10/15	67	0/15	0	.002
> 11 years	4/12	33	0/12	0	.13
> 40	16/20	80	0/20	0	< .001
All years
< 4 years	11/13	85	0/13	0	.001
4-11 years	9/15	60	0/15	0	.004
> 11 years	4/12	33	0/12	0	.13
> 180
All years	10/20	50	0/20	0	.002
< 4 years	6/13	46	0/13	0	.03
4-11 years	6/15	40	0/15	0	.03
> 11 years	2/12	17	0/12	0	.50

Abbreviations: AL, amyloid light chain; FLC-Diff, free light chain differential.