Table 1.

Study Participant Characteristics^a

	Comparison Group	Liver Disease	Pregnant Women	Normal Values
n	107	24	20
Age, y	58 ± 16a	57.1 ± 7.9	30.7 ± 6.9c
Gender (men/women), n	63/44	15/9	0/20c
Race (African American, Asian, Caucasian, other), n	31/13/61/2	2/2/16/4	4/1/15/0
Weight, kg	84.6 ± 20.9	93.2 ± 17.9	81.1 ± 20.9
Height, cm	169 ± 9.1	173.4 ± 10.7	158.7 ± 6.7
BMI, kg/m2	29.6 ± 7.1	31.0 ± 5.2	32.1 ± 7.4	<25
Estimated glomerular filtration rate, mL/min/1.73 m2b	82 ± 25	69.9 ± 29.3	81.6 ± 25.6	>60
Albumin, g/dL	4.2 ± 0.4	2.6 ± 0.5c	3.3 ± 0.3	3.6–5.1
Calcium, mg/dL	9.5 ± 0.4	8.4 ± 0.5c	9.1 ± 0.6	8.6–10.4
Calcium (corrected for albumin), g/dL	9.3 ± 0.4	9.5 ± 0.5	9.7 ± 0.5	8.6–10.4
DBP, μg/mL	218 ± 57	112.2 ± 64.0c	460.3 ± 229.5c	300–600
Total 25(OH)D, ng/mL	26.2 ± 11.4	14.0 ± 7.3c	26.7 ± 10.0	25–80d
Directly measured free 25(OH)D, pg/mL	4.5 ± 1.6	6.3 ± 3.2c	4.0 ± 1.1
Calculated free 25(OH)D, pg/mLe	7.6 ± 4.2	9.6 ± 4.9	5.7 ± 3.7
Calculated free 25(OH)D, pg/mLf	7.7 ± 4.3	9.8 ± 5.1	5.8 ± 3.8
iPTH, pg/mL	75.7 ± 39.2	51.1 ± 63.4	21.8 ± 18.0c	14–72

Abbreviation: BMI, body mass index.

^aUnless indicated otherwise, data are mean ± SD.

^bby MDRD formula.

^cStatistically significant group differences (P < .001, ANOVA for continuous variables or χ² for sex distribution).

^dFor Mayo Clinical Laboratories assay.

^eRef. 7.

^fModified from Ref. 11.