INTRODUCTION In studies of obese adolescents in various countries, vitamin D deficiency has been correlated with greater weight and elevated BMI. However, there is insufficient data on the relation between vitamin D status and body fat indexes in adolescence. The aim of this study was to investigate the association of serum (25[OH]D) concentrations with body mass index of healthy Iranian subjec...

STUDY DESIGN Descriptive cross-sectional study. PURPOSE To determine the prevalence of vitamin D deficiency in patients with degenerative diseases of the spine about to undergo spinal surgery and the relations between such deficiency and potential risk factors. OVERVIEW OF LITERATURE Vitamin D has a major role in musculoskeletal system health maintenance. Recently, studies on degenerative d...

OBJECTIVES The aim of the present study was to examine the prevalence and associated factors of dietary supplement use, particularly supplements containing vitamin D and fatty acids, in pregnant women enrolled in a multi-national study. DESIGN The Environmental Determinants of Diabetes in the Young (TEDDY) study is a prospective longitudinal cohort study. Maternal dietary supplement use was s...

We examine the capability of mean square displacement (MSD) analysis to extract reliable values of the diffusion coefficient D of a single particle undergoing Brownian motion in an isotropic medium in the presence of localization uncertainty. The theoretical results, supported by simulations, show that a simple unweighted least-squares fit of the MSD curve can provide the best estimate of D pro...

We consider the problem of selecting sequentially a unimodal subsequence from a sequence of independent identically distributed random variables, and we find that a person doing optimal sequential selection does so within a factor of the square root of two as well as a prophet who knows all of the random observations in advance of any selections. Our analysis applies in fact to selections of su...

CONTENTS For a real square matrix M, Hadamard's inequality gives an up1 . Introduction p e r bound H for the determinant of M; the bound is sharp if and 2. Distribution only if the rows of M are orthogonal. We study how much we 3. Analysis of |d|/H can expect that H overshoots the determinant of M, when the 4. Analysis of Iog(|d|/H) r o w s °f M are chosen randomly on the surface of the sphere....

Background: Both vitamin D deficiency and hypertension are prevalent in the general population. Several observations indicate an association between vitamin D deficiency and high blood pressure. The present case-control study aimed to compare serum 25-hydroxyvitamin D (25-OHD) in hypertensive patients versus healthy controls. Methods: One hundred patients aged 30-60 years with hypertension (...

We consider the limit distribution of maxima for a sequence of Gaussian nonstationary processes. As an application we investigate the linear interpolation error for a.s. continuous and mean square diierentiable Gaussian processes with stationary increments. The relation between the smoothness of incremental variance function, d(t) = E(X(s + t) ? X(s)) 2 ], and the interpolation errors in mean s...