George G. Rhoads

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BACKGROUND Whether the association between teenage pregnancy and adverse birth outcomes could be explained by deleterious social environment, inadequate prenatal care, or biological immaturity remains controversial. The objective of this study was to determine whether teenage pregnancy is associated with increased adverse birth outcomes independent of known(More)
BACKGROUND The hemoglobin threshold at which postoperative red-cell transfusion is warranted is controversial. We conducted a randomized trial to determine whether a higher threshold for blood transfusion would improve recovery in patients who had undergone surgery for hip fracture. METHODS We enrolled 2016 patients who were 50 years of age or older, who(More)
OBJECTIVE To search for an association between the Glu27Gln (rs1042714; B27) and the Arg16Gly (rs1042713; B16) polymorphisms of the beta 2-adrenergic receptor (ADRB2) gene and obesity. METHODS Meta-analysis of published studies, included if subjects were genotyped at either codon 27 ("B27") or codon 16 ("B16") of the ADRB2 gene and both obese and nonobese(More)
OBJECTIVE Our purpose was to determine whether obese women and underweight women have an increased risk of birth defects in their offspring. STUDY DESIGN A geographically based case-control study of women living in California and Illinois was performed. There were 499 mothers of offspring with neural tube defects, 337 mothers of offspring with other major(More)
We examined the relationship between infant and maternal outcomes and asthma complicating pregnancy, using historical cohort analysis of singleton live deliveries in New Jersey hospitals between 1989 and 1992 (n = 447,963). Subject mother-infant dyads were identified from linked birth certificate and maternal and newborn hospital claims data. Women with an(More)
BACKGROUND While previous studies demonstrated contrasting patterns of cancer risk among migrant populations from different ethnic groups in the United States, few studies have focused on the Korean-American population. This study compares cancer incidence rates between Korean-Americans, whites, and blacks in the United States and native Koreans. METHODS(More)
BACKGROUND Previous studies of air pollution and birth outcomes have not evaluated whether complicated pregnancies might be susceptible to the adverse effects of air pollution. It was hypothesised that trimester mean pollutant concentrations could be associated with fetal growth restriction, with larger risks among complicated pregnancies. METHODS A(More)
We conducted a study to examine seasonal changes in residential dust lead content and its relationship to blood lead in preschool children. We collected blood and dust samples (floors, windowsills, and carpets) to assess lead exposure. The geometric mean blood lead concentrations are 10.77 and 7.66 microg/dL for the defined hot and cold periods,(More)
The Lp(a) lipoprotein is structurally related to low-density lipoprotein but is found in lower plasma concentration. It has been associated with coronary disease in several white populations. To test the generalizability of this association, we measured serum Lp(a) by quantitative immunoelectrophoresis in 303 Hawaiian men of Japanese ancestry with a prior(More)
Factors associated with early pregnancy vomiting were investigated in 9098 first-trimester registrants in the Collaborative Perinatal Project. Vomiting in the absence of hyperemesis or gastroenteritis was noted in 56% of all women, and was more common among primigravidas (P = .002), younger women (P less than .001), women with less than 12 years of(More)