Author
David F. Williamson
Other affiliations: Pennington Biomedical Research Center
Bio: David F. Williamson is an academic researcher from Centers for Disease Control and Prevention. The author has contributed to research in topics: Population & Overweight. The author has an hindex of 83, co-authored 176 publications receiving 49605 citations. Previous affiliations of David F. Williamson include Pennington Biomedical Research Center.
Papers published on a yearly basis
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TL;DR: For example, this article found a strong relationship between the breadth of exposure to abuse or household dysfunction during childhood and multiple risk factors for several of the leading causes of death in adults.
12,712 citations
TL;DR: For example, this paper found that obesity was associated with 111 909 excess deaths (95% confidence interval [CI], 53 754170 064) and underweight with 33 746 excess deaths.
Abstract: Results Relative to the normal weight category (BMI 18.5 to 25), obesity (BMI 30) was associated with 111 909 excess deaths (95% confidence interval [CI], 53 754170 064) and underweight with 33 746 excess deaths (95% CI, 15 726-51 766). Overweight was not associated with excess mortality (�86 094 deaths; 95% CI, �161 223 to �10 966). The relative risks of mortality associated with obesity were lower in NHANES II and NHANES III than in NHANES I. Conclusions Underweight and obesity, particularly higher levels of obesity, were associated with increased mortality relative to the normal weight category. The impact of obesity on mortality may have decreased over time, perhaps because of improvements in public health and medical care. These findings are consistent with the increases in life expectancy in the United States and the declining mortality rates from ischemic heart disease.
2,566 citations
Brown University1, National Institutes of Health2, Johns Hopkins University3, Pennington Biomedical Research Center4, University of Tennessee Health Science Center5, University of Minnesota6, Wake Forest University7, Baylor College of Medicine8, Centers for Disease Control and Prevention9, University of Texas Health Science Center at San Antonio10, University of Colorado Denver11, Harvard University12, University of Pittsburgh13, University of Washington14, University of Alabama at Birmingham15, University of Pennsylvania16, Mount Sinai St. Luke's and Mount Sinai Roosevelt17, University of Arkansas for Medical Sciences18
TL;DR: An intensive lifestyle intervention focusing on weight loss did not reduce the rate of cardiovascular events in overweight or obese adults with type 2 diabetes.
Abstract: In 16 study centers in the United States, we randomly assigned 5145 overweight or obese patients with type 2 diabetes to participate in an intensive lifestyle interven tion that promoted weight loss through decreased caloric intake and increased physical activity (intervention group) or to receive diabetes support and education (control group). The primary outcome was a composite of death from cardiovascu lar causes, nonfatal myocardial infarction, nonfatal stroke, or hospitalization for angina during a maximum follow-up of 13.5 years. Results The trial was stopped early on the basis of a futility analysis when the median fol low-up was 9.6 years. Weight loss was greater in the intervention group than in the control group throughout the study (8.6% vs. 0.7% at 1 year; 6.0% vs. 3.5% at study end). The intensive lifestyle intervention also produced greater reductions in gly cated hemoglobin and greater initial improvements in fitness and all cardiovascular risk factors, except for low-density-lipoprotein cholesterol levels. The primary outcome occurred in 403 patients in the intervention group and in 418 in the control group (1.83 and 1.92 events per 100 person-years, respectively; hazard ratio in the intervention group, 0.95; 95% confidence interval, 0.83 to 1.09; P = 0.51). Conclusions An intensive lifestyle intervention focusing on weight loss did not reduce the rate of cardiovascular events in overweight or obese adults with type 2 diabetes. (Funded by the National Institutes of Health and others; Look AHEAD ClinicalTrials.gov number, NCT00017953.)
2,048 citations
TL;DR: A powerful graded relationship exists between adverse childhood experiences and risk of attempted suicide throughout the life span, and alcoholism, depressed affect, and illicit drug use, which are strongly associated with such experiences, appear to partially mediate this relationship.
Abstract: ContextSuicide is a leading cause of death in the United States, but identifying
persons at risk is difficult. Thus, the US surgeon general has made suicide
prevention a national priority. An expanding body of research suggests that
childhood trauma and adverse experiences can lead to a variety of negative
health outcomes, including attempted suicide among adolescents and adults.ObjectiveTo examine the relationship between the risk of suicide attempts and
adverse childhood experiences and the number of such experiences (adverse
childhood experiences [ACE] score).Design, Setting, and ParticipantsA retrospective cohort study of 17 337 adult health maintenance
organization members (54% female; mean [SD] age, 57 [15.3] years) who attended
a primary care clinic in San Diego, Calif, within a 3-year period (1995-1997)
and completed a survey about childhood abuse and household dysfunction, suicide
attempts (including age at first attempt), and multiple other health-related
issues.Main Outcome MeasureSelf-reported suicide attempts, compared by number of adverse childhood
experiences, including emotional, physical, and sexual abuse; household substance
abuse, mental illness, and incarceration; and parental domestic violence,
separation, or divorce.ResultsThe lifetime prevalence of having at least 1 suicide attempt was 3.8%.
Adverse childhood experiences in any category increased the risk of attempted
suicide 2- to 5-fold. The ACE score had a strong, graded relationship to attempted
suicide during childhood/adolescence and adulthood (P<.001).
Compared with persons with no such experiences (prevalence of attempted suicide,
1.1%), the adjusted odds ratio of ever attempting suicide among persons with
7 or more experiences (35.2%) was 31.1 (95% confidence interval, 20.6-47.1).
Adjustment for illicit drug use, depressed affect, and self-reported alcoholism
reduced the strength of the relationship between the ACE score and suicide
attempts, suggesting partial mediation of the adverse childhood experience–suicide
attempt relationship by these factors. The population-attributable risk fractions
for 1 or more experiences were 67%, 64%, and 80% for lifetime, adult, and
childhood/adolescent suicide attempts, respectively.ConclusionsA powerful graded relationship exists between adverse childhood experiences
and risk of attempted suicide throughout the life span. Alcoholism, depressed
affect, and illicit drug use, which are strongly associated with such experiences,
appear to partially mediate this relationship. Because estimates of the attributable
risk fraction caused by these experiences were large, prevention of these
experiences and the treatment of persons affected by them may lead to progress
in suicide prevention.
2,019 citations
TL;DR: Although the correlations between anthropometric measures of obesity in childhood and those in adulthood varied considerably among studies, the associations were consistently positive and the risk of adult obesity was at least twice as high for obese children as for nonobese children.
1,952 citations
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23 Sep 2019TL;DR: The Cochrane Handbook for Systematic Reviews of Interventions is the official document that describes in detail the process of preparing and maintaining Cochrane systematic reviews on the effects of healthcare interventions.
Abstract: The Cochrane Handbook for Systematic Reviews of Interventions is the official document that describes in detail the process of preparing and maintaining Cochrane systematic reviews on the effects of healthcare interventions.
21,235 citations
TL;DR: For example, this article found a strong relationship between the breadth of exposure to abuse or household dysfunction during childhood and multiple risk factors for several of the leading causes of death in adults.
12,712 citations
TL;DR: The proportion of Asian people with a high risk of type 2 diabetes and cardiovascular disease is substantial at BMIs lower than the existing WHO cut-off point for overweight (> or =25 kg/m2), but available data do not necessarily indicate a clear BMI cut-offs point for all Asians for overweight or obesity.
9,536 citations
TL;DR: These estimates suggest that the increases in body weight are continuing in men and in children and adolescents while they may be leveling off in women; among women, no overall increases in the prevalence of obesity were observed.
Abstract: ContextThe prevalence of overweight in children and adolescents and obesity in adults in the United States has increased over several decades.ObjectiveTo provide current estimates of the prevalence and trends of overweight in children and adolescents and obesity in adults.Design, Setting, and ParticipantsAnalysis of height and weight measurements from 3958 children and adolescents aged 2 to 19 years and 4431 adults aged 20 years or older obtained in 2003-2004 as part of the National Health and Nutrition Examination Survey (NHANES), a nationally representative sample of the US population. Data from the NHANES obtained in 1999-2000 and in 2001-2002 were compared with data from 2003-2004.Main Outcome MeasuresEstimates of the prevalence of overweight in children and adolescents and obesity in adults. Overweight among children and adolescents was defined as at or above the 95th percentile of the sex-specific body mass index (BMI) for age growth charts. Obesity among adults was defined as a BMI of 30 or higher; extreme obesity was defined as a BMI of 40 or higher.ResultsIn 2003-2004, 17.1% of US children and adolescents were overweight and 32.2% of adults were obese. Tests for trend were significant for male and female children and adolescents, indicating an increase in the prevalence of overweight in female children and adolescents from 13.8% in 1999-2000 to 16.0% in 2003-2004 and an increase in the prevalence of overweight in male children and adolescents from 14.0% to 18.2%. Among men, the prevalence of obesity increased significantly between 1999-2000 (27.5%) and 2003-2004 (31.1%). Among women, no significant increase in obesity was observed between 1999-2000 (33.4%) and 2003-2004 (33.2%). The prevalence of extreme obesity (body mass index ≥40) in 2003-2004 was 2.8% in men and 6.9% in women. In 2003-2004, significant differences in obesity prevalence remained by race/ethnicity and by age. Approximately 30% of non-Hispanic white adults were obese as were 45.0% of non-Hispanic black adults and 36.8% of Mexican Americans. Among adults aged 20 to 39 years, 28.5% were obese while 36.8% of adults aged 40 to 59 years and 31.0% of those aged 60 years or older were obese in 2003-2004.ConclusionsThe prevalence of overweight among children and adolescents and obesity among men increased significantly during the 6-year period from 1999 to 2004; among women, no overall increases in the prevalence of obesity were observed. These estimates were based on a 6-year period and suggest that the increases in body weight are continuing in men and in children and adolescents while they may be leveling off in women.
9,278 citations
University of Washington1, Sapienza University of Rome2, Mekelle University3, University of Texas at San Antonio4, King Saud bin Abdulaziz University for Health Sciences5, Debre markos University6, Emory University7, University of Oxford8, University of Cartagena9, United Nations Population Fund10, University of Birmingham11, Stanford University12, Aga Khan University13, University of Melbourne14, National Taiwan University15, University of Cambridge16, University of California, San Diego17, Public Health Foundation of India18, Public Health England19, University of Peradeniya20, Harvard University21, National Institutes of Health22, Tehran University of Medical Sciences23, Auckland University of Technology24, University of Sheffield25, University of Western Australia26, Karolinska Institutet27, Birzeit University28, Brandeis University29, American Cancer Society30, Ochsner Medical Center31, Yonsei University32, University of Bristol33, Heidelberg University34, Vanderbilt University35, South African Medical Research Council36, Jordan University of Science and Technology37, New Generation University College38, Northeastern University39, Simmons College40, Norwegian Institute of Public Health41, Boston University42, Chinese Center for Disease Control and Prevention43, University of Bari44, University of São Paulo45, University of Otago46, University of Crete47, International Centre for Diarrhoeal Disease Research, Bangladesh48, Fred Hutchinson Cancer Research Center49, Teikyo University50, Bhabha Atomic Research Centre51, University of Tokyo52, Finnish Institute of Occupational Health53, Heriot-Watt University54, University of Alabama at Birmingham55, Griffith University56, National Center for Disease Control and Public Health57, University of California, Irvine58, Johns Hopkins University59, New York University60, University of Queensland61, Universidade Federal de Minas Gerais62, National Research University – Higher School of Economics63, University of Bergen64, Columbia University65, Shandong University66, University of North Carolina at Chapel Hill67, Fujita Health University68, Korea University69, Chongqing Medical University70, Zhejiang University71
TL;DR: The global, regional, and national prevalence of overweight and obesity in children and adults during 1980-2013 is estimated using a spatiotemporal Gaussian process regression model to estimate prevalence with 95% uncertainty intervals (UIs).
9,180 citations