Table 2. Serum free light chain... | American Society of Hematology

Table 2.

Serum free light chain reference ranges

Population	N	Kappa (mg/L)	Lambda (mg/L)	Ratio
Original description^a	282	3.3-19.4	5.7-26.3	0.26-1.65
General population^b^,⁷	41,882
Age <70 years		6.3-39.0	5.9-36.7	0.44-2.16
Age ≥70 years		7.0-55.8	6.4-48.0	0.46-2.59
Renal impairment ^b^,⁸	6,503
GFR 45-59		7.8-83.6	7.3-65.1	0.46-2.62
GFR 30-44		8.8-103.3	8.2-73.2	0.48-3.38
GFR <30		11.7-265.1	12.6-150.9	0.54-3.30

Population	N	Kappa (mg/L)	Lambda (mg/L)	Ratio
Original description^a	282	3.3-19.4	5.7-26.3	0.26-1.65
General population^b^,⁷	41,882
Age <70 years		6.3-39.0	5.9-36.7	0.44-2.16
Age ≥70 years		7.0-55.8	6.4-48.0	0.46-2.59
Renal impairment ^b^,⁸	6,503
GFR 45-59		7.8-83.6	7.3-65.1	0.46-2.62
GFR 30-44		8.8-103.3	8.2-73.2	0.48-3.38
GFR <30		11.7-265.1	12.6-150.9	0.54-3.30

^a

95% reference interval.

^b

99.5% reference interval.