Publications

BACKGROUND

Obstructive lung disease is a significant cause of morbidity and healthcare burden within the USA. A growing body of evidence has suggested that vitamin D levels can influence the course or incidence of obstructive lung disease. However, there is an insufficient previous investigation of this association.

STUDY DESIGN AND METHODS

We used the National Health and Nutrition Examination Survey (NHANES) cycles 2007-2008 and 2009-2010 spirometry results of individuals aged 40 years and older to assess the association between serum 25-hydroxyvitamin D levels and obstructive lung disease, as defined by the American Thoracic Society using the lower limit of normal. We used stage multivariate survey-logistic regression.

RESULTS

The final model included age, gender, body mass index, pack-years smoking history, season, income-to-poverty ratio and race/ethnicity. In the primary analysis using vitamin D as a continuous variable, there was no association between vitamin D levels and obstructive lung disease. We noted a trend between 'other Hispanic' self-identified race and serum vitamin D levels wherein higher levels were associated with higher odds of obstructive lung disease in this ethnicity, but not among other racial or ethnic groups (OR (95% CI)=1.40 (0.98 to 1.99), p=0.06). In a secondary analysis, when vitamin D was measured as a categorical variable, there was a significant association between the highest levels of serum vitamin D levels and lesser odds of obstructive lung disease (OR (95% CI)=0.77 [0.61 to 0.98], p0.04).

CONCLUSIONS

Higher serum vitamin D levels among adults are associated with decreased odds of obstructive lung disease in the general population. Results among non-Mexican Hispanic participants highlight the need for further research in minority populations. More work is needed to address the course and incidence of lung disease in the USA.

In this commentary, we argue that the limited experiential exposure of medical students to different cultures makes the instruction devoted to communication skills inadequate. The relationship of these dynamics to honesty in clinical encounters is explored. Absent significant experiential exposure to differing group cultures to counter the natural tendency to favor one's own, discrimination prevails. Knowledge or awareness of cultural differences does not necessarily equate to communication proficiency. Critically, interactions based on lived experience offer a deeper knowledge and understanding of culturally meaningful nuances than that imparted through other formats. Medical students' lack of experiential exposure to different cultures results in communication miscues. When the stakes are high, people detect those miscues diminishing trust in the doctor-patient relationship. Greater experiential cultural exposure will enhance the facility and use of culturally specific communication cues. At its core, the requisite transformation will require medical students to adapt to other cultures and greater representation by marginalized and stigmatized populations not only among the studentry but staff and faculty. The time is now to ensure that the physicians we produce can care for all Americans. What cannot be taught must be identified by the selection process. Competence with half the population is a failure for American medicine.