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. 2014:2014:364941.
doi: 10.1155/2014/364941. Epub 2014 Mar 20.

A patient-centered electronic tool for weight loss outcomes after Roux-en-Y gastric bypass

G Craig Wood  1 , Peter Benotti  1 , Glenn S Gerhard  2 , Elaina K Miller  3 , Yushan Zhang  3 , Richard J Zaccone  3 , George A Argyropoulos  4 , Anthony T Petrick  5 , Christopher D Still  6
Affiliations

A patient-centered electronic tool for weight loss outcomes after Roux-en-Y gastric bypass

G Craig Wood et al. J Obes. 2014.

Abstract

BACKGROUND. Current patient education and informed consent regarding weight loss expectations for bariatric surgery candidates are largely based on averages from large patient cohorts. The variation in weight loss outcomes illustrates the need for establishing more realistic weight loss goals for individual patients. This study was designed to develop a simple web-based tool which provides patient-specific weight loss expectations. METHODS. Postoperative weight measurements after Roux-en-Y gastric bypass (RYGB) were collected and analyzed with patient characteristics known to influence weight loss outcomes. Quantile regression was used to create expected weight loss curves (25th, 50th, and 75th %tile) for the 24 months after RYGB. The resulting equations were validated and used to develop web-based tool for predicting weight loss outcomes. RESULTS. Weight loss data from 2986 patients (2608 in the primary cohort and 378 in the validation cohort) were included. Preoperative body mass index (BMI) and age were found to have a high correlation with weight loss accomplishment (P < 0.0001 for each). An electronic tool was created that provides easy access to patient-specific, 24-month weight loss trajectories based on initial BMI and age. CONCLUSIONS. This validated, patient-centered electronic tool will assist patients and providers in patient teaching, informed consent, and postoperative weight loss management.

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Figures

Figure 1
Figure 1
Distribution of initial BMI within various age intervals for patients that had RYGB (n = 2608).
Figure 2
Figure 2
Scatter plot of the percent of excess weight lost for all patients from 6 months before surgery to 30 months after surgery.
Figure 3
Figure 3
Comparison of estimated post-RYGB BMI between the primary cohort and the validation cohort using an age of 50 and an initial BMI of 50 kg/m2.
Figure 4
Figure 4
Example of a patient tracking their weight after surgery using the Get~2~Goal electronic tool.
See this image and copyright information in PMC

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