TY - JOUR T1 - INvestigating factors of decline in cognitive function or dementia AU - Mozaffarian GA Y1 - 2011/02/14 N1 - 10.1001/archinternmed.2010.529 JO - Archives of Internal Medicine SP - 266 EP - 267 VL - 171 IS - 3 N2 - This article may lead the reader to conclude that a low level of serum vitamin D in an elderly person would lead to a decline in cognitive function or dementia. Moreover, it may lead the reader to believe that supplementation with vitamin D would perhaps be beneficial and preventive. Usually, at baseline, one could discern major difference between elderly persons who have dementia with those who do not. For example, elderly individuals who have baseline dementia may have less physical activity, less sun exposure, or poor dietary habits. One can take any of these differences and perhaps show an association between these parameters and future development of dementia. To present data showing low levels of serum vitamin D and stating that “To our knowledge, no prospective study has examined the association between vitamin D and cognitive decline or dementia,” as shown in the abstract, is perhaps not appropriate. SN - 0003-9926 M3 - doi: 10.1001/archinternmed.2010.529 UR - http://dx.doi.org/10.1001/archinternmed.2010.529 ER -