We evaluated whether the obesity-associated years of life lost (YLL) have decreased over calendar time. We implemented a meta-analysis including only studies with two or more serial body mass index (BMI) assessments at different calendar years. For each BMI category (normal weight: BMI 18.5 to <25 >[reference]; overweight: BMI 25 to60, YLL for grade 1 obesity decreased by 1.02 years (P < 0.001) and increased by 0.63 years for grade 2-3 obesity (P = 0.63). Among women aged ≤60, YLL for grade 1 obesity decreased by 4.21 years (P < 0.001) and by 4.97 years (P < 0.001) for grade 2-3 obesity. In women aged >60, YLL for grade 1 obesity decreased by 3.98 years (P < 0.001) and by 2.64 years (P = 0.001) for grade 2-3 obesity. Grade 1 obesity's association with decreased longevity has reduced for older Caucasian men. For Caucasian women, there is evidence of a decline in the obesity YLL association across all ages.
Recommended CitationMehta, Tapan S.; Fontaine, Kevin R.; Keith, Scott W.; Bangalore, Sripal S.; de los Campos, Gustavo; Bartolucci, Alfred; Pajewski, Nicholas M.; and Allison, David B., "Obesity and mortality: are the risks declining? Evidence from multiple prospective studies in the United States." (2014). Department of Pharmacology and Experimental Therapeutics Faculty Papers. Paper 62.