Harvey W Kaufman

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BACKGROUND Vitamin D deficiency is highly prevalent and is associated with dyslipidemia and cardiovascular disease. The impact of correcting vitamin D deficiency on blood lipids, strong cardiovascular disease prognostic factors, is unknown. METHODS AND RESULTS To determine relationships between 25-hydroxyvitamin D levels and lipids, we analyzed 4.06(More)
OBJECTIVE To estimate the screening rate and prevalence of gestational diabetes mellitus (GDM) and the screening rate and prevalence of postpartum diabetes, in a large, national sample of pregnant women. We also estimated the potential effects of the new International Association of Diabetes and Pregnancy Study Groups recommendations, which replace the(More)
CONTEXT Hypothyroidism, overt or subclinical, is associated with adverse outcomes for pregnant women and their offspring. Knowledge of current national thyroid testing rates and positivity during pregnancy is limited. OBJECTIVE The aim of the study was to estimate thyroid testing rate and positivity during pregnancy and postpartum, including testing and(More)
BACKGROUND Anticoagulation control with warfarin, as assessed by the international normalized ratio (INR), is challenging. Time in the therapeutic range has been inversely correlated with major hemorrhage, thrombosis, and mortality. Quest Diagnostics offers standardized INR laboratory testing services to approximately half of US physician practices. To(More)
BACKGROUND Interpretation of parathyroid hormone (iPTH) requires knowledge of vitamin D status that is influenced by season. OBJECTIVE Characterize the temporal relationship between 25-hydroxyvitamin D3 levels [25(OH)D3] and intact iPTH for several seasons, by gender and latitude in the U.S. and relate 25-hydrovitamin D2 [25(OH)D2] levels with PTH levels(More)
OBJECTIVE The objective of the study was to estimate the rates of testing, prevalence, and follow-up testing for chlamydial and gonococcal infection in a nationally based population that is comparable with the US pregnant population in terms of age and race. STUDY DESIGN We extracted laboratory results for 1,293,423 pregnant women tested over a 3-year(More)
Lower neighborhood socioeconomic status (SES) is associated with higher cardiovascular disease (CVD) risk. Black women have a higher CVD risk and are more likely to live in poor neighborhoods than white women. We examined the association of neighborhood SES with several CVD biomarkers using data from the Black Women’s Health Study (BWHS), a follow-up study(More)
Vitamin D deficiency, which has been linked to an increased risk of colorectal cancer, is particularly common among African Americans. Previous studies of vitamin D status and breast cancer risk, mostly conducted in white women, have had conflicting results. We examined the relationship between predicted vitamin D status and incidence of breast cancer in a(More)
Five compact chemistry analyzers were evaluated for the measurement of lipids. Fresh plasma or serum specimens from a standardized research laboratory were assayed for total cholesterol on all five analyzers. Triglycerides and high-density lipoprotein cholesterol were assayed on the three analyzers that could measure both of these analytes. Study results(More)