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

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

1,* , 2
, 3
, 1
 and 1
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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Abstract

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 which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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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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