Edmonton Obesity Staging System: association with weight history and mortality risk

Author:

Kuk Jennifer L.1,Ardern Chris I.1,Church Timothy S.2,Sharma Arya M.3,Padwal Raj4,Sui Xuemei5,Blair Steven N.65

Affiliation:

1. School of Kinesiology and Health Science, York University, Toronto, ON M3J 1P3, Canada.

2. Laboratory of Preventive Medicine Research, Pennington Biomedical Research Center Louisiana State University System, Baton Rouge, LA 70808-4124, USA.

3. Obesity Research & Management, University of Alberta, Edmonton, AB T5H 3V9, Canada.

4. Clinical Pharmacology and General Internal Medicine, University of Alberta, Edmonton, AB T6G 2B7, Canada.

5. Department of Exercise Science, Arnold School of Public Health, University of South Carolina, Columbia, SC 29208, USA.

6. Department of Epidemiology and Biostatistics, Arnold School of Public Health, University of South Carolina, Columbia, SC 29208, USA.

Abstract

We sought to determine whether the Edmonton Obesity Staging System (EOSS), a newly proposed tool using obesity-related comorbidities, can help identify obese individuals who are at greater mortality risk. Data from the Aerobics Center Longitudinal Study (n = 29 533) were used to assess mortality risk in obese individuals by EOSS stage (follow-up (SD), 16.2 (7.5) years). The effect of weight history and lifestyle factors on EOSS classification was explored. Obese participants were categorized, using a modified EOSS definition, as stages 0 to 3, based on the severity of their risk profile and conditions (stage 0, no risk factors or comorbidities; stage 1, mild conditions; and stages 2 and 3, moderate to severe conditions). Compared with normal-weight individuals, obese individuals in stage 2 or 3 had a greater risk of all-cause mortality (stage 2 hazards ratio (HR) (95% CI), 1.6 (1.3–2.0); stage 3 HR, 1.7 (1.4–2.0)) and cardiovascular-related mortality (stage 2 HR, 2.1 (1.6–2.8); stage 3 HR. 2.1 (1.6–2.8)). Stage 0/1 was not associated with higher mortality risk. Lower self-ascribed preferred weight, weight at age 21, cardiorespiratory fitness, reported dieting, and fruit and vegetable intake were each associated with an elevated risk for stage 2 or 3. Thus, EOSS offers clinicians a useful approach to identify obese individuals at elevated risk of mortality who may benefit from more attention to weight management. Further research is necessary to determine what EOSS factors are most predictive of mortality risk, and whether these findings can be generalized to other obese populations.

Publisher

Canadian Science Publishing

Subject

Physiology (medical),Nutrition and Dietetics,Physiology,General Medicine,Endocrinology, Diabetes and Metabolism

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