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Nutrients 2012, 4(3), 197-207; doi:10.3390/nu4030197

Serum 25-Hydroxyvitamin D Levels Among Boston Trainee Doctors in Winter

1,* , 2
1 Department of Medicine, Children’s Hospital Boston, Harvard Medical School, 300 Longwood AvCe, Boston, MA 02115, USA 2 Department of Emergency Medicine, Massachusetts General Hospital, Harvard Medical School, 326 Cambridge St, Suite 410, Boston, MA 02114, USA 3 Department of Medicine, University of Pittsburgh, 200 Meyran Avenue, Suite 300, Pittsburgh, PA 15213, USA
* Author to whom correspondence should be addressed.
Received: 1 December 2011 / Revised: 29 February 2012 / Accepted: 5 March 2012 / Published: 16 March 2012
(This article belongs to the Special Issue Vitamin D)
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As indoor workers, trainee doctors may be at risk for inadequate vitamin D. All trainee doctors (residents) in a Boston pediatric training program (residency) were invited to complete a survey, and undergo testing for serum 25-hydroxyvitamin D [25(OH)D], PTH, and calcium during a 3-week period in March 2010. We examined the association between resident characteristics and serum 25(OH)D using Chi2 and Kruskal-Wallis test and multivariable linear and logistic regression. Of the 119 residents, 102 (86%) participated. Although the mean serum 25(OH)D level was 67 nmol/L (±26), 25 (25%) had a level < 50 nmol/L and 3 (3%) residents had levels < 25 nmol/L. In the multivariable model, factors associated with 25(OH)D levels were: female sex (β 12.7, 95% CI 3.6, 21.7), white race (β 21.7, 95% CI 11.7, 31.7), travel to more equatorial latitudes during the past 3 months (β 6.3, 95% CI 2.0, 10.5) and higher daily intake of vitamin D (β 1.1, 95% CI 0.04, 2.1). Although one in four residents in our study had a serum 25(OH)D < 50 nmol/L, all of them would have been missed using current Centers for Medicare and Medicaid Services (CMS) screening guidelines. The use of traditional risk factors appears insufficient to identify low vitamin D in indoor workers at northern latitudes.
Keywords: vitamin D; deficiency; residents; indoor workers vitamin D; deficiency; residents; indoor workers
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

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Growdon, A.S.; Camargo Jr., C.A.; Clark, S.; Hannon, M.; Mansbach, J.M. Serum 25-Hydroxyvitamin D Levels Among Boston Trainee Doctors in Winter. Nutrients 2012, 4, 197-207.

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