. Author manuscript; available in PMC: 2012 Nov 1.

Published in final edited form as: Int J Tuberc Lung Dis. 2011 Nov;15(11):1522–i. doi: 10.5588/ijtld.10.0701

Table 3.

Summary of studies evaluating vitamin D levels in African adults

Author, year, reference	Patient population	Location, latitude	Time of recruitment	Vitamin D assay	25(OH)D level, ng/ml mean ± SD
Felekem, 1999¹⁹	30 adults aged 20–22 years; 31 pregnant women aged 22–28 years	Addis Ababa, Ethiopia 9°03′ North	September	HPLC	Healthy 9 Pregnant 10 (median values)
Wejse, 2007¹⁸	362 TB patients; 494 healthy adults, aged 37 ± 13 years	Guinea-Bissau 12°00′ North	April 2005–February 2006	HPLC-MS	TB 31 ± 9 Controls 43 ± 14 P < 0 001 for comparison between groups
Allali, 2009²⁰	415 healthy women aged 50 ± 9 years	Rabat, Morocco 34°02′ North	June–August	Chemiluminescence assay	18 ± 8
Glew, 2010²¹	22 healthy Fulani men, aged 48 ± 8 years, 29 healthy Fulani women, aged 56 ± 14 years	Gombe, Nigeria 10°20′10″ North	Not stated	HPLC	Men 32 ± 2 Women 24 ± 1
Current study	50 healthy adults; 50 HIV-infected adults; 50 TB-HIV co-infected adults	Mbara, Uganda 0°37′ South	January–February	HPLC	Healthy 26 ± 7 HIV 28 ± 11 TB-HIV 24 ± 11

SD = standard deviation; HPLC = high performance liquid chromatography; HPLC-MS = HPLC-tandem mass spectrometry assay.