Ellen Smit

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BACKGROUND/OBJECTIVES Although both frailty and low vitamin D have been separately associated with an increased risk for adverse health, their joined effects on mortality have not been reported. The current study examined prospectively the effects of frailty and vitamin D status on mortality in US older adults. SUBJECTS/METHODS Participants aged ≥ 60(More)
BACKGROUND No studies have addressed the "fit but fat" paradigm using accelerometry data. AIM The study was to determine if 1) higher levels of accelerometer-determined physical activity are favorably associated with biomarkers in overweight or obese persons (objective 1); and 2) overweight or obese individuals who are sufficiently active have better or(More)
BACKGROUND Arsenic is an immunotoxicant. Clinical reports observe the reactivation of varicella zoster virus (VZV) in people who have recovered from arsenic poisoning and in patients with acute promyelocytic leukemia that have been treated with arsenic trioxide. OBJECTIVE We evaluated the association between arsenic and the seroprevalence of VZV IgG(More)
We evaluated the association between urinary arsenic and the seroprevalence of total hepatitis A antibodies (total anti-HAV: IgG and IgM) in 11 092 participants aged ⩾6 years using information collected in the US National Health and Nutrition Examination Survey (2003-2012). Multivariate logistic regression models evaluated associations between total(More)
Background. Animal toxicity tests and epidemiological studies suggest that exposure to PBDEs can alter attention behavior, yet few studies have examined their association with diagnosis of attention deficit hyperactivity disorder (ADHD) in adolescents. Methods. Logistic regression was used to examine the cross-sectional association between ADHD and lipid(More)
Obesity and food insecurity rates are higher among rural compared to non-rural populations. Little is known, however, about how family-home environments influence childhood obesity-related behaviors, particularly in rural settings. This study examined associations between the family-home nutrition (FN) environment, food insecurity, and dietary intake(More)
Purpose To examine the effect of 25-hydroxyvitamin D (serum 25 (OH) D), body mass index and leisure time physical activity on all-cause mortality and determine the association between serum 25 (OH) D and leisure time physical activity among US adults. Methods We used data from 16,285 adults 20 years and older who participated in a home interview and a(More)
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