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Modeling the impact of adjustable gastric banding on survival in patients with morbid obesity

Citation

Sendi, P and Palmer, AJ and Hauri, P and Craig, BA and Horber, FF, Modeling the impact of adjustable gastric banding on survival in patients with morbid obesity, Obesity Research, 10, (4) pp. 291-295. ISSN 1071-7323 (2002) [Refereed Article]

DOI: doi:10.1038/oby.2002.40

Abstract

Objective: Morbid obesity is associated with premature death. Adjustable gastric banding may lead to substantial weight loss in patients with morbid obesity. Little is known about the impact of weight loss on survival after adjustable gastric banding. We therefore developed a mathematical model to estimate life expectancy in patients with a body mass index (BMI) > 40 kg/m 2 undergoing bariatric surgery. Research Methods and Procedures: We developed a non-homogeneous Markov chain consisting of five states: the absorbing state ("dead") and the four recurrent states BMI > 40 kg/m 2 , BMI 36 to 39 kg/m 2 , BMI 32 to 35 kg/m 2 , and BMI 25 to 31 kg/m 2 . Scenarios of weight loss and age- and sex-dependent risk of death, as well as BMI-dependent excess mortality were extracted from life tables and published literature. All patients entered the model through the state of BMI > 40 kg/m2. Results: In men aged either 18 or 65 years at the time of surgery, who moved from the state BMI > 40 kg/m 2 to the next lower state of BMI 36 to 39 kg/m 2 , life expectancy increased by 3 and 0.7 years, respectively. In women aged either 18 or 65 years at the time of surgery, who moved from the state BMI > 40 kg/m 2 to the next lower state BMI 36 to 39 kg/m 2 , life expectancy increased by 4.5 and 2.6 years, respectively. Weight loss to lower BMI strata resulted in further gains of life expectancy in both men and women. Discussion: Within the limitations of the modeling study, adjustable gastric banding in patients with morbid obesity may substantially increase life expectancy.

Item Details

Item Type:Refereed Article
Research Division:Economics
Research Group:Applied Economics
Research Field:Health Economics
Objective Division:Health
Objective Group:Health and Support Services
Objective Field:Health Policy Economic Outcomes
Author:Palmer, AJ (Professor Andrew Palmer)
ID Code:74722
Year Published:2002
Web of Science® Times Cited:4
Deposited By:Research Division
Deposited On:2011-12-12
Last Modified:2011-12-13
Downloads:0

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