[Note: according to these statistics, dietary deficiency of omega-3 fatty acids, found in fish and fish/krill oil is the sixth biggest cause of premature deaths in the U.S. – some 84,000 a year. Eating too many artificial trans-fatty acids adds another 82,000.]
Background: Knowledge of the number of deaths caused by risk factors is needed for health policy and priority setting. Our aim was to estimate the mortality effects of the following 12 modifiable dietary, lifestyle, and metabolic risk factors in the United States (US) using consistent and comparable methods: high blood glucose, low-density lipoprotein (LDL) cholesterol, and blood pressure; overweight–obesity; high dietary trans fatty acids and salt; low dietary polyunsaturated fatty acids, omega-3 fatty acids (seafood), and fruits and vegetables; physical inactivity; alcohol use; and tobacco smoking.
Methods and Findings: We used data on risk factor exposures in the US population from nationally representative health surveys and disease-specific mortality statistics from the National Center for Health Statistics. We obtained the etiological effects of risk factors on disease-specific mortality, by age, from systematic reviews and meta-analyses of epidemiological studies that had adjusted (i) for major potential confounders, and (ii) where possible for regression dilution bias. We estimated the number of disease-specific deaths attributable to all non-optimal levels of each risk factor exposure, by age and sex.
• Tobacco smoking and high blood pressure were responsible for an estimated 467,000 (95% confidence interval [CI] 436,000–500,000) and 395,000 (372,000–414,000) deaths, accounting for about one in five or six deaths in US adults.
• Overweight-obesity (216,000; 188,000–237,000) and physical inactivity (191,000; 164,000–222,000) were each responsible for nearly 1 in 10 deaths.
• High dietary salt (102,000; 97,000–107,000),
• Low dietary omega-3 fatty acids (84,000; 72,000–96,000), and high dietary trans fatty acids (82,000; 63,000–97,000) were the dietary risks with the largest mortality effects.
Although 26,000 (23,000–40,000) deaths from ischemic heart disease, ischemic stroke, and diabetes were averted by current alcohol use, they were outweighed by 90,000 (88,000–94,000) deaths from other cardiovascular diseases, cancers, liver cirrhosis, pancreatitis, alcohol use disorders, road traffic and other injuries, and violence.
Conclusions: Smoking and high blood pressure, which both have effective interventions, are responsible for the largest number of deaths in the US. Other dietary, lifestyle, and metabolic risk factors for chronic diseases also cause a substantial number of deaths in the US.
Source: PloS Medicine, Apr 2009; vol 6. Goodarz D, Ding EL, Mozaffarian D, Taylor B, Rehm J, Murray CJL, Ezzati M. Harvard School of Public Health, Boston; Initiative for Global Health, Harvard University, Cambridge; Harvard Medical School, Boston, Massachusetts; Institute for Health Metrics and Evaluation, University of Washington, Seattle, Washington, USA; Centre for Addiction and Mental Health, and Public Health Sciences, University of Toronto, Canada; Clinical Psychology and Psychotherapy, Technische Universität Dresden, Germany.