Table II. Laboratory parameters.

	Vitamin D Deficient N = 35 N(%) - nominal mean(95% CI) - continuous	Non-Vitamin D Deficient N = 113 N(%) mean(95% CI) - continuous	P value
Albumin-corrected calcium, mg/dL	9.87 (9.44-10.30)	10.19 (9.94-10.44)	0.20
Phosphate, mg/dL	3.61 (3.27 – 3.95)	3.71 (3.51-3.90)	0.64
Alkaline phosphatase, U/L	114.8 (38.2 – 191.4)	79.5 (59.4 – 99.6)	0.10
Serum protein electrophoresis, g/dL	2.37 (1.72 – 3.03)	2.13 (1.78 – 2.49)	0.52
Urine M spike, mg/24 hours	1.09 (0.14 -2.04)	1.01 (0.55 – 1.47)	0.88
Free light chain ratio
<0.03 or >32	24 (26)	70 (74)	0.76
0.03-32	3 (30)	7 (70)
Beta-2 microglobulin, mcg/mL	6.05 (4.00- 8.10)	4.95 (3.90 – 6.00)	0.32
Lactate dehydrogenase, U/L	202.9 (162.1 – 243.7)	191.2 (175.6 – 206.8)	0.51
C-reactive protein, mg/L	2.40 (0.09 – 4.72)	0.84 (0.54 – 1.14)	0.02
Albumin, g/dL	3.12 (0.10 – 2.91)	3.39 (0.04 – 3.32)	0.0029
Creatinine, mg/dL	1.75 (1.17 – 2.35)	1.24 (1.04 – 1.43)	0.03
Hemoglobin, g/dL	11.7 (11.0 – 12.3)	11.6 (11.3 – 11.9)	0.80
Platelet count, × 10 (9)/L	229.5 (199.1 – 260.0)	235.3 (215.7 – 255.0)	0.77
Leukocyte count, × 10 (9)/L	6.0 (5.2 – 6.8)	5.6 (5.1 – 6.1)	0.40

Vitamin D status: Deficiency is defined as 25(OH)D < 20 ng/mL.

Free light chain ratio is calculated as κ/λ; that is, free κ concentration divided by free λ concentration