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1. First passage and first hitting times of Lévy flights and Lévy walks

Author

Vladimir V Palyulin, George Blackburn, Michael A Lomholt, Nicholas W Watkins, Ralf Metzler, Rainer Klages, and Aleksei V Chechkin

Subjects
Lévy flights, Lévy walks, first-passage time, first-hitting time, Science, Physics, QC1-999
Abstract

For both Lévy flight and Lévy walk search processes we analyse the full distribution of first-passage and first-hitting (or first-arrival) times. These are, respectively, the times when the particle moves across a point at some given distance from its initial position for the first time, or when it lands at a given point for the first time. For Lévy motions with their propensity for long relocation events and thus the possibility to jump across a given point in space without actually hitting it (‘leapovers’), these two definitions lead to significantly different results. We study the first-passage and first-hitting time distributions as functions of the Lévy stable index, highlighting the different behaviour for the cases when the first absolute moment of the jump length distribution is finite or infinite. In particular we examine the limits of short and long times. Our results will find their application in the mathematical modelling of random search processes as well as computer algorithms.

Published
2019
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2. Weight Change 2 Years After Termination of the Intensive Lifestyle Intervention in the Look AHEAD Study

Author

Ariana M, Chao, Thomas A, Wadden, Robert I, Berkowitz, George, Blackburn, Paula, Bolin, Jeanne M, Clark, Mace, Coday, Jeffrey M, Curtis, Linda M, Delahanty, Gareth R, Dutton, Mary, Evans, Linda J, Ewing, John P, Foreyt, Linda J, Gay, Edward W, Gregg, Helen P, Hazuda, James O, Hill, Edward S, Horton, Denise K, Houston, John M, Jakicic, Robert W, Jeffery, Karen C, Johnson, Steven E, Kahn, William C, Knowler, Anne, Kure, Katherine L, Michalski, Maria G, Montez, Rebecca H, Neiberg, Jennifer, Patricio, Anne, Peters, Xavier, Pi-Sunyer, Henry, Pownall, David, Reboussin, Bruce, Redmon, W Jack, Rejeski, Helmut, Steinburg, Martha, Walker, Donald A, Williamson, Rena R, Wing, Holly, Wyatt, Susan Z, Yanovski, and Ping, Zhang

Subjects
Male, medicine.medical_specialty, Endocrinology, Diabetes and Metabolism, Medicine (miscellaneous), 030209 endocrinology & metabolism, Type 2 diabetes, Overweight, Article, law.invention, 03 medical and health sciences, 0302 clinical medicine, Endocrinology, Randomized controlled trial, law, Weight loss, Internal medicine, Weight Loss, medicine, Humans, Obesity, 030212 general & internal medicine, Life Style, Aged, Nutrition and Dietetics, business.industry, Weight change, Middle Aged, medicine.disease, Female, Observational study, medicine.symptom, business, Weight gain
Abstract

Objective: This study evaluated weight changes after cessation of the 10-year intensive lifestyle intervention (ILI) in the Look AHEAD (Action for Health in Diabetes) study. It was hypothesized that ILI participants would be more likely to gain weight during the 2-year observational period following termination of weight-loss-maintenance counseling than would participants in the diabetes support and education (DSE) control group. Methods: Look AHEAD was a randomized controlled trial that compared the effects of ILI and DSE on cardiovascular morbidity and mortality in participants with overweight/obesity and type 2 diabetes. Look AHEAD was converted to an observational study in September 2012. Results: Two years after the end of the intervention (EOI), ILI and DSE participants lost a mean (SE) of 1.2 (0.2) kg and 1.8 (0.2) kg, respectively (P = 0.003). In addition, 31% of ILI and 23.9% of DSE participants gained ≥ 2% (P < 0.001) of EOI weight, whereas 36.3% and 45.9% of the respective groups lost ≥ 2% of EOI weight (P = 0.001). Two years after the EOI, ILI participants reported greater use of weight-control behaviors than DSE participants. Conclusions: Both groups lost weight during the 2-year follow-up period, but more ILI than DSE participants gained ≥ 2% of EOI weight. Further understanding is needed of factors that affected long-term weight change in both groups.

Published
2020
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3. Weight Change During the Postintervention Follow-up of Look AHEAD

Author

Rena R. Wing, Rebecca H. Neiberg, Judy L. Bahnson, Jeanne M. Clark, Mark A. Espeland, James O. Hill, Karen C. Johnson, William C. Knowler, KayLoni Olson, Helmut Steinburg, Xavier Pi-Sunyer, Thomas A. Wadden, Holly Wyatt, Lee Swartz, Dawn Jiggetts, Jeanne Charleston, Lawrence Cheskin, Nisa M. Maruthur, Scott J. Pilla, Danielle Diggins, Mia Johnson, George A. Bray, Frank L. Greenway, Donna H. Ryan, Catherine Champagne, Valerie Myers, Jeffrey Keller, Tiffany Stewart, Jennifer Arceneaux, Karen Boley, Greta Fry, Lisa Jones, Kim Landry, Melissa Lingle, Marisa Smith, Cora E. Lewis, Sheikilya Thomas, Stephen Glasser, Gareth Dutton, Amy Dobelstein, Sara Hannum, Anne Hubbell, DeLavallade Lee, Phyllis Millhouse, L. Christie Oden, Cathy Roche, Jackie Grant, Janet Turman, David M. Nathan, Valerie Goldman, Linda Delahanty, Mary Larkin, Kristen Dalton, Roshni Singh, Melanie Ruazol, Medha N. Munshi, Sharon D. Jackson, Roeland J.W. Middelbeek, A. Enrique Caballero, Anthony Rodriguez, George Blackburn, Christos Mantzoros, Ann McNamara, Jeanne Anne Breen, Marsha Miller, Debbie Bochert, Suzette Bossart, Paulette Cohrs, Susan Green, April Hamilton, Eugene Leshchinskiy, Loretta Rome, John P. Foreyt, Molly Gee, Henry Pownall, Ashok Balasubramanyam, Chu-Huang Chen, Peter Jones, Michele Burrington, Allyson Clark Gardner, Sharon Griggs, Michelle Hamilton, Veronica Holley, Sarah Lee, Sarah Lane Liscum, Susan Cantu-Lumbreras, Julieta Palencia, Jennifer Schmidt, Jayne Thomas, Carolyn White, Charlyne Wright, Monica Alvarez, Beate Griffin, Mace Coday, Donna Valenski, Karen Johnson, Robert W. Jeffery, Tricia Skarphol, John P. Bantle, J. Bruce Redmon, Kerrin Brelje, Carolyne Campbell, Mary Ann Forseth, Soni Uccellini, Mary Susan Voeller, Blandine Laferrère, Jennifer Patricio, Jose Luchsinger, Priya Palta, Sarah Lyon, Kim Kelly, Barbara J. Maschak-Carey, Robert I. Berkowitz, Ariana Chao, Renee Davenport, Katherine Gruber, Sharon Leonard, Olivia Walsh, John M. Jakicic, Jacqueline Wesche-Thobaben, Lin Ewing, Andrea Hergenroeder, Mary Korytkowski, Susan Copelli, Rebecca Danchenko, Diane Ives, Juliet Mancino, Lisa Martich, Meghan McGuire, Tracey Y. Murray, Linda Semler, Kathy Williams, Caitlin Egan, Elissa Jelalian, Jeanne McCaffery, Kathryn Demos McDermott, Jessica Unick, Kirsten Annis, Jose DaCruz, Ariana Rafanelli, Helen P. Hazuda, Juan Carlos Isaac, Prepedigna Hernandez, Steven E. Kahn, Edward J. Boyko, Elaine Tsai, Lorena Wright, Karen Atkinson, Ivy Morgan-Taggart, Jolanta Socha, Heidi Urquhart, Paula Bolin, Harelda Anderson, Sara Michaels, Ruby Johnson, Patricia Poorthunder, Janelia Smiley, Anne L. Peters, Siran Ghazarian, Elizabeth Beale, Edgar Ramirez, Gabriela Rodriguez, Valerie Ruelas, Sara Serafin-Dokhan, Martha Walker, Marina Perez, Lynne E. Wagenknecht, David Reboussin, Mike E. Miller, Peter Brubaker, Nicholas Pajewski, Michael Bancks, Jingzhong Ding, Gagan Deep, Kathleen Hayden, Stephen R. Rapp, Felicia Simpson, Haiying Chen, Bonnie C. Sachs, Denise Houston, Shyh-Huei Chen, Andrea Anderson, Jerry M. Barnes, Mary Barr, Tara D. Beckner, Delilah R. Cook, Carrie C. Williams, Joni Evans, Katie Garcia, Sarah A. Gaussoin, Carol Kittel, Lea Harvin, Marjorie Howard, James Lovato, June Pierce, Debbie Steinberg, Christopher Webb, Jennifer Walker, Michael P. Walkup, Carolyn Watkins, Santica M. Marcovina, Jessica Hurting, John J. Albers, Vinod Gaur, Michael Nevitt, Ann Schwartz, John Shepherd, Michaela Rahorst, Lisa Palermo, Susan Ewing, Cynthia Hayashi, and Jason Maeda

Subjects
Advanced and Specialized Nursing, Endocrinology, Diabetes and Metabolism, Internal Medicine, Clinical Care/Education/Nutrition/Psychosocial Research
Abstract

OBJECTIVE Patients with type 2 diabetes are encouraged to lose weight, but excessive weight loss in older adults may be a marker of poor health and subsequent mortality. We examined weight change during the postintervention period of Look AHEAD, a randomized trial comparing intensive lifestyle intervention (ILI) with diabetes support and education (DSE) (control) in overweight/obese individuals with type 2 diabetes and sought to identify predictors of excessive postintervention weight loss and its association with mortality. RESEARCH DESIGN AND METHODS These secondary analyses compared postintervention weight change (year 8 to final visit; median 16 years) in ILI and DSE in 3,999 Look AHEAD participants. Using empirically derived trajectory categories, we compared four subgroups: weight gainers (n = 307), weight stable (n = 1,561), steady losers (n = 1,731), and steep losers (n = 380), on postintervention mortality, demographic variables, and health status at randomization and year 8. RESULTS Postintervention weight change averaged −3.7 ± 9.5%, with greater weight loss in the DSE than the ILI group. The steep weight loss trajectory subgroup lost on average 17.7 ± 6.6%; 30% of steep losers died during postintervention follow-up versus 10–18% in other trajectories (P < 0001). The following variables distinguished steep losers from weight stable: baseline, older, longer diabetes duration, higher BMI, and greater multimorbidity; intervention, randomization to control group and less weight loss in years 1–8; and year 8, higher prevalence of frailty, multimorbidity, and depressive symptoms and lower use of weight control strategies. CONCLUSIONS Steep weight loss postintervention was associated with increased risk of mortality. Older individuals with longer duration of diabetes and multimorbidity should be monitored for excessive unintentional weight loss.

Published
2021

5. Catchment-Scale Flood Modelling in Data-Sparse Regions Using Open-Access Geospatial Technology

Author

Alan George Blackburn and Iguniwari Thomas Ekeu-wei

Subjects
Synthetic aperture radar, Geospatial analysis, flood risk management, 010504 meteorology & atmospheric sciences, Floodplain, 0208 environmental biotechnology, Geography, Planning and Development, Geomatics, lcsh:G1-922, geoinformatics, 02 engineering and technology, computer.software_genre, 01 natural sciences, Catchment scale, remote sensing, Flood risk management, Caesar-Lisflood, Radar imaging, Earth and Planetary Sciences (miscellaneous), hydrodynamic model, Computers in Earth Sciences, Digital elevation model, geospatial, 0105 earth and related environmental sciences, Remote sensing, geography, geography.geographical_feature_category, Flood myth, business.industry, Environmental resource management, 020801 environmental engineering, Remote sensing (archaeology), niger river basin, Environmental science, data-sparse, Catchment area, business, open-access, computer, lcsh:Geography (General)
Abstract

Consistent data are seldom available for whole-catchment flood modelling in many developing regions, hence this study aimed to explore an integrated approach for flood modelling and mapping by combining available segmented hydrographic, topographic, floodplain roughness, calibration, and validation datasets using a two-dimensional Caesar-Lisflood hydrodynamic model to quantify and recreate the extent and impact of the historic 2012 flood in Nigeria. Available segments of remotely-sensed and in situ datasets (including hydrological, altimetry, digital elevation model, bathymetry, aerial photo, optical imagery, and radar imagery data) available to different degrees in the Niger-South hydrological area were systematically integrated to draw maximum benefits from all available data. Retrospective modelling, calibration, and validation were undertaken for the whole Niger- South hydrological catchment area of Nigeria, and then these data were segmented into sub-domains for re-validation to understand how data variability and uncertainties impact the accuracy of model outcomes. Furthermore, aerial photos were applied for the first time in the study area for flood model validation and for understanding how different physio-environmental properties influenced the synthetic aperture radar flood delineation capacity in the Niger Delta region of Nigeria. This study demonstrates how the complementary strengths of open, readily available geospatial datasets and tools can be leveraged to model and map flooding within acceptable levels of uncertainty for flood risk management.

Published
2020
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6. Development and psychometric validation of a novel scale for measuring ‘psychedelic preparedness’

Author

Rosalind G. McAlpine, George Blackburne, and Sunjeev K. Kamboj

Subjects
Medicine, Science
Abstract

Abstract Preparing participants for psychedelic experiences is crucial for ensuring these experiences are safe and, potentially beneficial. However, there is currently no validated measure to assess the extent to which participants are well-prepared for such experiences. Our study aimed to address this gap by developing, validating, and testing the Psychedelic Preparedness Scale (PPS). Using a novel iterative Delphi-focus group methodology (‘DelFo’), followed by qualitative pre-test interviews, we incorporated the perspectives of expert clinicians/researchers and of psychedelic users to generate items for the scale. Psychometric validation of the PPS was carried out in two large online samples of psychedelic users (N = 516; N = 716), and the scale was also administered to a group of participants before and after a 5–7-day psilocybin retreat (N = 46). Exploratory and confirmatory factor analysis identified four factors from the 20-item PPS: Knowledge-Expectations, Intention-Preparation, Psychophysical-Readiness, and Support-Planning. The PPS demonstrated excellent reliability (ω = 0.954) and evidence supporting convergent, divergent and discriminant validity was also obtained. Significant differences between those scoring high and low (on psychedelic preparedness) before the psychedelic experience were found on measures of mental health/wellbeing outcomes assessed after the experience, suggesting that the scale has predictive utility. By prospectively measuring modifiable pre-treatment preparatory behaviours and attitudes using the PPS, it may be possible to determine whether a participant has generated the appropriate mental ‘set’ and is therefore likely to benefit from a psychedelic experience, or at least, less likely to be harmed.

Published
2024
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8. Partial Meal Replacement Plan and Quality of the Diet at 1 Year: Action for Health in Diabetes (Look AHEAD) Trial

Author

Hollie A. Raynor, Andrea M. Anderson, Gary D. Miller, Rebecca Reeves, Linda M. Delahanty, Mara Z. Vitolins, Patricia Harper, Connie Mobley, Kati Konersman, Elizabeth Mayer-Davis, Frederick L. Brancati, Jeff Honas, Lawrence Cheskin, Jeanne M. Clark, Kerry Stewart, Richard Rubin, Jeanne Charleston, Kathy Horak, George A. Bray, Kristi Rau, Allison Strate, Brandi Armand, Frank L. Greenway, Donna H. Ryan, Donald Williamson, Amy Bachand, Michelle Begnaud, Betsy Berhard, Elizabeth Caderette, Barbara Cerniauskas, David Creel, Diane Crow, Helen Guay, Nancy Kora, Kelly LaFleur, Kim Landry, Missy Lingle, Jennifer Perault, Mandy Shipp, Marisa Smith, Elizabeth Tucker, Cora E. Lewis, Sheikilya Thomas, Monika Safford, Vicki DiLillo, Charlotte Bragg, Amy Dobelstein, Stacey Gilbert, Stephen Glasser, Sara Hannum, Anne Hubbell, Jennifer Jones, DeLavallade Lee, Ruth Luketic, Karen Marshall, L. Christie Oden, Janet Raines, Cathy Roche, Janet Truman, Nita Webb, Audrey Wrenn, David M. Nathan, Heather Turgeon, Kristina Schumann, Enrico Cagliero, Linda Delahanty, Kathryn Hayward, Ellen Anderson, Laurie Bissett, Richard Ginsburg, Valerie Goldman, Virginia Harlan, Charles McKitrick, Alan McNamara, Theresa Michel, Alexi Poulos, Barbara Steiner, Joclyn Tosch, Edward S. Horton, Sharon D. Jackson, Osama Hamdy, A. Enrique Caballero, Sarah Bain, Elizabeth Bovaird, Ann Goebel-Fabbri, Lori Lambert, Sarah Ledbury, Maureen Malloy, Kerry Ovalle, George Blackburn, Christos Mantzoros, Kristinia Day, Ann McNamara, James O. Hill, Marsha Miller, JoAnn Phillipp, Robert Schwartz, Brent Van Dorsten, Judith Regensteiner, Salma Benchekroun, Ligia Coelho, Paulette Cohrs, Elizabeth Daeninck, Amy Fields, Susan Green, April Hamilton, Jere Hamilton, Eugene Leshchinskiy, Michael McDermott, Lindsey Munkwitz, Loretta Rome, Kristin Wallace, Terra Worley, John P. Foreyt, Rebecca S. Reeves, Henry Pownall, Ashok Balasubramanyam, Peter Jones, Michele Burrington, Chu-Huang Chen, Allyson Clark, Molly Gee, Sharon Griggs, Michelle Hamilton, Veronica Holley, Jayne Joseph, Patricia Pace, Julieta Palencia, Olga Satterwhite, Jennifer Schmidt, Devin Volding, Carolyn White, Mohammed F. Saad, Siran Ghazarian, Ken C. Chiu, Medhat Botrous, Michelle Chan, Magpuri Perpetua, Karen C. Johnson, Carolyn Gresham, Stephanie Connelly, Amy Brewer, Mace Coday, Lisa Jones, Lynne Lichtermann, Shirley Vosburg, J. Lee Taylor, Abbas E. Kitabchi, Helen Lambeth, Debra Clark, Andrea Crisler, Gracie Cunningham, Donna Green, Debra Force, Robert Kores, Renate Rosenthal, Elizabeth Smith, Maria Sun, Judith Soberman, Robert W. Jeffery, Carolyn Thorson, John P. Bantle, J. Bruce Redmon, Richard S. Crow, Scott Crow, Susan K. Raatz, Kerrin Brelje, Carolyne Campbell, Jeanne Carls, Tara Carmean-Mihm, Emily Finch, Anna Fox, Elizabeth Hoelscher, La Donna James, Vicki A. Maddy, Therese Ockenden, Birgitta I. Rice, Tricia Skarphol, Ann D. Tucker, Mary Susan Voeller, Cara Walcheck, Xavier Pi-Sunyer, Jennifer Patricio, Stanley Heshka, Carmen Pal, Lynn Allen, Diane Hirsch, Mary Anne Holowaty, Thomas A. Wadden, Barbara J. Maschak-Carey, Stanley Schwartz, Gary D. Foster, Robert I. Berkowitz, Henry Glick, Shiriki K. Kumanyika, Johanna Brock, Helen Chomentowski, Vicki Clark, Canice Crerand, Renee Davenport, Andrea Diamond, Anthony Fabricatore, Louise Hesson, Stephanie Krauthamer-Ewing, Robert Kuehnel, Patricia Lipschutz, Monica Mullen, Leslie Womble, Nayyar Iqbal, David E. Kelley, Jacqueline Wesche-Thobaben, Lewis Kuller, Andrea Kriska, Janet Bonk, Rebecca Danchenko, Daniel Edmundowicz, Mary L. Klem, Monica E. Yamamoto, Barb Elnyczky, George A. Grove, Pat Harper, Janet Krulia, Juliet Mancino, Anne Mathews, Tracey Y. Murray, Joan R. Ritchea, Jennifer Rush, Karen Vujevich, Donna Wolf, Rena R. Wing, Renee Bright, Vincent Pera, John Jakicic, Deborah Tate, Amy Gorin, Kara Gallagher, Amy Bach, Barbara Bancroft, Anna Bertorelli, Richard Carey, Tatum Charron, Heather Chenot, Kimberley Chula-Maguire, Pamela Coward, Lisa Cronkite, Julie Currin, Maureen Daly, Caitlin Egan, Erica Ferguson, Linda Foss, Jennifer Gauvin, Don Kieffer, Lauren Lessard, Deborah Maier, J.P. Massaro, Tammy Monk, Rob Nicholson, Erin Patterson, Suzanne Phelan, Hollie Raynor, Douglas Raynor, Natalie Robinson, Deborah Robles, Jane Tavares, Steven M. Haffner, Maria G. Montez, Carlos Lorenzo, Steven E. Kahn, Brenda Montgomery, Robert Knopp, Edward Lipkin, Matthew L. Maciejewski, Dace Trence, Terry Barrett, Joli Bartell, Diane Greenberg, Anne Murillo, Betty Ann Richmond, April Thomas, William C. Knowler, Paula Bolin, Tina Killean, Cathy Manus, Jonathan Krakoff, Jeffrey M. Curtis, Justin Glass, Sara Michaels, Peter H. Bennett, Tina Morgan, Shandiin Begay, Bernadita Fallis, Jeanette Hermes, Diane F. Hollowbreast, Ruby Johnson, Maria Meacham, Julie Nelson, Carol Percy, Patricia Poorthunder, Sandra Sangster, Nancy Scurlock, Leigh A. Shovestull, Janelia Smiley, Katie Toledo, Christina Tomchee, Darryl Tonemah, Anne Peters, Valerie Ruelas, Siran Ghazarian Sengardi, Kathryn Graves, Sara Serafin-Dokhan, Mark A. Espeland, Judy L. Bahnson, Lynne Wagenknecht, David Reboussin, W. Jack Rejeski, Alain Bertoni, Wei Lang, Gary Miller, David Lefkowitz, Patrick S. Reynolds, Paul Ribisl, Mara Vitolins, Michael Booth, Kathy M. Dotson, Amelia Hodges, Carrie C. Williams, Jerry M. Barnes, Patricia A. Feeney, Jason Griffin, Lea Harvin, William Herman, Patricia Hogan, Sarah Jaramillo, Mark King, Kathy Lane, Rebecca Neiberg, Andrea Ruggiero, Christian Speas, Michael P. Walkup, Karen Wall, Michelle Ward, Delia S. West, Terri Windham, Michael Nevitt, Susan Ewing, Cynthia Hayashi, Jason Maeda, Lisa Palermo, Michaela Rahorst, Ann Schwartz, John Shepherd, Santica M. Marcovina, Greg Strylewicz, Ronald J. Prineas, Teresa Alexander, Lisa Billings, Charles Campbell, Sharon Hall, Susan Hensley, Yabing Li, Zhu-Ming Zhang, Elizabeth J. Mayer-Davis, Robert Moran, Richard Foushee, Nancy J. Hall, Barbara Harrison, Van S. Hubbard, Susan Z. Yanovski, Lawton S. Cooper, Jeffrey Cutler, Eva Obarzanek, Edward W. Gregg, David F. Williamson, and Ping Zhang

Subjects
Male, medicine.medical_specialty, Meal replacement, Diet, Reducing, Ethnic group, Type 2 diabetes, Overweight, Motor Activity, Article, law.invention, Body Mass Index, Nutrition Policy, Food group, Randomized controlled trial, law, Environmental health, Diabetes mellitus, Diet, Diabetic, medicine, Humans, Obesity, Precision Medicine, Diet, Fat-Restricted, Life Style, Meals, Aged, Foods, Specialized, Meal, Nutrition and Dietetics, business.industry, General Medicine, Middle Aged, medicine.disease, Combined Modality Therapy, United States, Diabetes Mellitus, Type 2, Physical therapy, Patient Compliance, Female, medicine.symptom, Snacks, business, Food Science
Abstract

Background Little is known about diet quality with a reduced-energy, low-fat, partial meal replacement plan, especially in individuals with type 2 diabetes. The Action for Health in Diabetes (Look AHEAD) trial implemented a partial meal replacement plan in the Intensive Lifestyle Intervention. Objective To compare dietary intake and percent meeting fat-related and food group dietary recommendations in Intensive Lifestyle Intervention and Diabetes Support and Education groups at 12 months. Design A randomized controlled trial comparing Intensive Lifestyle Intervention with Diabetes Support and Education at 0 and 12 months. Participants/setting From 16 US sites, the first 50% of participants (aged 45 to 76 years, overweight or obese, with type 2 diabetes) were invited to complete dietary assessments. Complete 0- and 12-month dietary assessments (collected between 2001 and 2004) were available for 2,397 participants (46.6% of total participants), with 1,186 randomized to Diabetes Support and Education group and 1,211 randomized to Intensive Lifestyle Intervention group. Main outcome measures A food frequency questionnaire assessed intake: energy; percent energy from protein, fat, carbohydrate, polyunsaturated fatty acids, and saturated fats; trans -fatty acids; cholesterol; fiber; weekly meal replacements; and daily servings from food groups from the Food Guide Pyramid. Statistical analyses performed Mixed-factor analyses of covariance, using Proc MIXED with a repeated statement, with age, sex, race/ethnicity, education, and income controlled. Unadjusted χ 2 tests compared percent meeting fat-related and food group recommendations at 12 months. Results At 12 months, Intensive Lifestyle Intervention participants had a significantly lower fat and cholesterol intake and greater fiber intake than Diabetes Support and Education participants. Intensive Lifestyle Intervention participants consumed more servings per day of fruits; vegetables; and milk, yogurt, and cheese; and fewer servings per day of fats, oils, and sweets than Diabetes Support and Education participants. A greater percentage of Intensive Lifestyle Intervention participants than Diabetes Support and Education participants met fat-related and most food group recommendations. Within Intensive Lifestyle Intervention, a greater percentage of participants consuming two or more meal replacements per day than participants consuming less than one meal replacement per day met most fat-related and food group recommendations. Conclusions The partial meal replacement plan consumed by Intensive Lifestyle Intervention participants was related to superior diet quality.

Published
2014

9. Obesity and cardiovascular disease risk: research update

Author

George Blackburn, Kathleen J. Melanson, Peter F. Wilson, James M. Rippe, and Kyle J. McInnis

Subjects
Framingham Risk Score, business.industry, Coronary Disease, General Medicine, Disease, Overweight, medicine.disease, Disease cluster, Obesity, Risk Assessment, Metabolic Diseases, Cardiovascular Diseases, Environmental health, medicine, Humans, medicine.symptom, Risk factor, Cardiology and Cardiovascular Medicine, business, Weight gain, Dyslipidemia
Abstract

The obesity epidemic has reached unprecedented proportions in Western society. Evidence continues to accumulate that obesity is associated with significant morbidity and mortality and in particular that it is an independent risk factor for cardiovascular disease (CVD). The association of obesity with CVD and its risk factors, including hypertension, dyslipidemia, glucose intolerance, and impaired hemostasis is becoming more clearly understood. An increasing body of data indicates that risk factors tend to cluster in obese individuals and may act synergistically to increase these people's risk for CVD. Individuals with disproportionate visceral adiposity are at significantly greater risk for CVD. Adult weight gain also underlies the development of many risk factors and augments the risk of CVD. Physicians can play a vital and active role in the prevention and treatment of obesity and overweight and thereby reduce patients' CVD risk.

Published
2001

10. Weight gain from novel antipsychotic drugs: need for action

Author

Alan I. Green, George Blackburn, Robert M. Goisman, David B. Allison, and Jayendra K. Patel

Subjects
medicine.medical_specialty, Schizophrenia (object-oriented programming), medicine.medical_treatment, Population, Type 2 diabetes, Disease, Weight Gain, Pharmacotherapy, Weight loss, Glucose Intolerance, Weight Loss, medicine, Humans, Obesity, education, Antipsychotic, Psychiatry, Exercise, Life Style, education.field_of_study, business.industry, Public health, medicine.disease, Psychiatry and Mental health, Schizophrenia, medicine.symptom, business, Antipsychotic Agents
Abstract

Obesity is common in schizophrenia, and people with schizophrenia appear to be at increased risk for certain obesity-related conditions, such as type 2 diabetes and cardiovascular disease. Antipsychotic drugs, used chronically to control symptoms of schizophrenia, are associated with often-substantial weight gain, a side effect that is a special concern with the latest generation of highly effective “novel” agents. That the most effective (e.g., novel) antipsychotic medications lead to substantial weight gain presents the field with a critical public health problem. Although preliminary data have been reported regarding the beneficial use of behavior therapy programs for short-term weight control in patients with schizophrenia, the available data are quite limited, and there are no data regarding the long-term beneficial effects of these programs in this population. The obesity field recently has developed programs emphasizing “lifestyle changes” (e.g., diet, exercise, and problem-solving skills) to successfully manage weight in patients without schizophrenia. Such programs can be adapted for patients with schizophrenia through the use of highly structured and operationalized modules emphasizing medication compliance, social skills development, and participation in outpatient programs. Moreover, these programs can potentially be combined with the use of adjunctive pharmacotherapy to maximize and maintain weight loss. The field must solve the paradox that some of our most effective medications for schizophrenia produce substantial weight gain and its associated troubling health risks.

Published
2000

15. METABOLISM

Author

David Herndon, Douglas W. Wilmore, George Blackburn, P. William Curreri, and Robert R. Wolfe

Subjects
Surgery, Critical Care and Intensive Care Medicine
Published
1981
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