Analysis of vitamin D status at two academic medical centers and a national reference laboratory: result patterns vary by age, gender, season, and patient location

Table 1 25(OH)D orders and immunoassay results by institution, patient location, and sex

				Average 25(0H)D Results ± SD (ng/mL)			p value
	Patient location	# Orders females	# Orders males	Female (F)	Male (M)	All	F vs M
WCMC ^a	Private Ambulatory	28911	12766	30.5 ± 13.3	28.4 ± 12.7	29.8 ± 13.2	p < 0.001
	Hospital Outpatient Clinics	9046	3357	27.2 ± 12.4	24.9 ± 11.3	26.6 ± 12.1	p < 0.001
	Inpatient	1605	999	25.8 ± 19.2	21.9 ± 12.1	24.3 ± 16.9	p < 0.001
UIHC	Outpatient	37684	17153	30.5 ± 14.6	29.8 ± 14.3	30.2 ± 14.5	p < 0.001
	Dialysis^b	67	54	26.1 ± 13.0	32.6 ± 16.3	29.0 ± 14.8	p = 0.031
	Emergency Department	51	22	28.8 ± 17.5	24.8 ± 10.5	27.6 ± 15.8	p = 0.574
	Inpatient	2930	1923	27.3 ± 16.0	25.7 ± 18.3	26.7 ± 17.0	p < 0.001
	Inpatient ICU^c	167	186	22.6 ± 13.4	24.8 ± 14.0	23.8 ± 13.7	p = 0.119
ARUP	Unknown^d	414640	184208	29.4 ± 13.8	28.1 ± 13.0	29.0 ± 13.6	p < 0.001

^aA total of 749 WCMC results (437 female, 312 male) were omitted from this table due to uncertain designation of inpatient versus outpatient status. WCMC ED category not included as there were only 14 females and 2 males.
^bAll UIHC dialysis patients were considered outpatients for the purpose of this analysis.
^cUIHC inpatient ICU includes data from cardiovascular ICU, medical ICU, neonatal ICU, and pediatric ICU.
^dInpatient versus outpatient status was not identifiable. Specimens received from WCMC and UIHC were excluded from ARUP result analysis.

ISSN: 1472-6823