Table 1. Baseline characteristics.

	Patients N=33
Age, years, median (range)	59 (32–78)
Age <50 years, N (%)	7 (21)
Female sex, N (%)	12 (36)
Hemoglobin, median (range), g/dl	11.5 (7.5–15.6)
Hemoglobin <9 gm/dl, N (%)	1 (9)
Serum creatinine, median (range), mg/dl	0.9 (0.6–1.3)
Serum calcium, median (range), mg/dl	9.7 (8.5–13)
Calcium >11.0 mg/dl, N (%)	2 (7)
Lactate dehydrogenase, median (range), mg/dl	150 (95-206)
Beta-2 microglobulin, median (range), μg/ml	3.73 (1.37–10.9)
Beta-2 microglobulin, >3.5 μg/ml	17 (52)
Monoclonal protein type
IgG	22 (67)
IgA	7 (21)
FLC only	4 (12)
Serum monoclonal protein spike, median (range), g/dl	2.8 (0.0–6.0)
Serum monoclonal protein spike, >3.0 g/dl	16 (48)
Urine monoclonal protein spike, median (range), g/dl	0.1 (0.0–4.7)
Not present	12 (36)
Detected on immunofixation only	4 (12)
Measurable but <0.5 g/24 h	12 (33)
⩾0.5 g/24 h	5 (15)
BMPC percentage, median (range)	40 (2–90)
BMPC >60%	12 (36)
Serum FLC assay
Involved FLC, median (range), mg/dl	10.2 (0.4–929)
Involved/uninvolved ratio	33.2 (0.938–1206.66)
Involved/uninvolved FLC level⩾100 mg/dl	6 (18)
Involved/uninvolved FLC ratio⩾100	9 (27)

Abbreviations: BMPC, bone marrow plasma cell; FLC, free light chain.