Z Wang1, Y Peng1, B Dong1,2. 1. Centre for Chronic Disease, Centre for Clinical Research, The University of Queensland, Herston, Queensland, Australia. 2. Institute of Child and Adolescent Health, School of Public Health, Peking University Health Sciences Center, Beijing, China.
Abstract
BACKGROUND: It is debatable whether the body mass index (BMI) value that is associated with the lowest all-cause mortality has increased over time. Such an increase might indicate that the WHO BMI categories for normal weight and overweight need to be revised over time. This study assessed whether the BMI associated with the lowest all-cause mortality increased over time among US adults in the National Health Interview Survey. METHODS: This survey with up to 25 years of follow-up included 901 197 participants, aged 20 to 79 years with baseline BMI between 18.5 and 39.9 kg m-2 and known mortality status between the original survey dates and 31 December 2011. The BMI values associated with the lowest mortality were estimated for different survey time periods: 1986-1989, 1990-1994, 1995-1999, 2000-2004 and 2000-2009. RESULTS: Among 901 197 participants, 130 495 died during over 14.5 million person-years of follow-up. There was a U-shaped BMI-mortality association in all the survey periods. When we used the original follow-up durations, the BMI associated with the lowest mortality increased monotonically from 23.9 kg m-2 in 1986-1989 to 28.6 kg m-2 in 2005-2009. When using a fixed follow-up duration of 5, 10, 15 or 20 years, we found no monotonic increasing pattern in the BMI associated with the lowest mortality. With duration of 15 years, the estimates of BMI associated with lowest mortality appeared to be relatively stable over time among both the general population and never smokers free from cardiovascular disease and cancer at baseline. CONCLUSIONS: With a fixed long-term follow-up duration, the BMI value associated with the lowest mortality remains relatively stable over time.
BACKGROUND: It is debatable whether the body mass index (BMI) value that is associated with the lowest all-cause mortality has increased over time. Such an increase might indicate that the WHO BMI categories for normal weight and overweight need to be revised over time. This study assessed whether the BMI associated with the lowest all-cause mortality increased over time among US adults in the National Health Interview Survey. METHODS: This survey with up to 25 years of follow-up included 901 197 participants, aged 20 to 79 years with baseline BMI between 18.5 and 39.9 kg m-2 and known mortality status between the original survey dates and 31 December 2011. The BMI values associated with the lowest mortality were estimated for different survey time periods: 1986-1989, 1990-1994, 1995-1999, 2000-2004 and 2000-2009. RESULTS: Among 901 197 participants, 130 495 died during over 14.5 million person-years of follow-up. There was a U-shaped BMI-mortality association in all the survey periods. When we used the original follow-up durations, the BMI associated with the lowest mortality increased monotonically from 23.9 kg m-2 in 1986-1989 to 28.6 kg m-2 in 2005-2009. When using a fixed follow-up duration of 5, 10, 15 or 20 years, we found no monotonic increasing pattern in the BMI associated with the lowest mortality. With duration of 15 years, the estimates of BMI associated with lowest mortality appeared to be relatively stable over time among both the general population and never smokers free from cardiovascular disease and cancer at baseline. CONCLUSIONS: With a fixed long-term follow-up duration, the BMI value associated with the lowest mortality remains relatively stable over time.
Authors: Amy Berrington de Gonzalez; Patricia Hartge; James R Cerhan; Alan J Flint; Lindsay Hannan; Robert J MacInnis; Steven C Moore; Geoffrey S Tobias; Hoda Anton-Culver; Laura Beane Freeman; W Lawrence Beeson; Sandra L Clipp; Dallas R English; Aaron R Folsom; D Michal Freedman; Graham Giles; Niclas Hakansson; Katherine D Henderson; Judith Hoffman-Bolton; Jane A Hoppin; Karen L Koenig; I-Min Lee; Martha S Linet; Yikyung Park; Gaia Pocobelli; Arthur Schatzkin; Howard D Sesso; Elisabete Weiderpass; Bradley J Willcox; Alicja Wolk; Anne Zeleniuch-Jacquotte; Walter C Willett; Michael J Thun Journal: N Engl J Med Date: 2010-12-02 Impact factor: 91.245
Authors: Emanuele Di Angelantonio; Shilpa Bhupathiraju; David Wormser; Pei Gao; Stephen Kaptoge; Amy Berrington de Gonzalez; Benjamin Cairns; Rachel Huxley; Chandra Jackson; Grace Joshy; Sarah Lewington; JoAnn Manson; Neil Murphy; Alpa Patel; Jonathan Samet; Mark Woodward; Wei Zheng; Maigen Zhou; Narinder Bansal; Aurelio Barricarte; Brian Carter; James Cerhan; George Smith; Xianghua Fang; Oscar Franco; Jane Green; Jim Halsey; Janet Hildebrand; Keum Jung; Rosemary Korda; Dale McLerran; Steven Moore; Linda O'Keeffe; Ellie Paige; Anna Ramond; Gillian Reeves; Betsy Rolland; Carlotta Sacerdote; Naveed Sattar; Eleni Sofianopoulou; June Stevens; Michael Thun; Hirotsugu Ueshima; Ling Yang; Young Yun; Peter Willeit; Emily Banks; Valerie Beral; Zhengming Chen; Susan Gapstur; Marc Gunter; Patricia Hartge; Sun Jee; Tai-Hing Lam; Richard Peto; John Potter; Walter Willett; Simon Thompson; John Danesh; Frank Hu Journal: Lancet Date: 2016-07-13 Impact factor: 79.321