The Metabolic and Bariatric Surgery Accreditation and Quality Improvement Program (MBSAQIP) is a database focused on bariatric surgery data from the American Society for Metabolic & Bariatric Surgery (ASMBS) Centers of Excellence. We aim to evaluate the completeness, internal validity, accuracy, and consistency of MBSAQIP from 2015 to 2019.


We compiled all subsets of data from the MBSAQIP Participant User Data File (PUF) into one main file. We evaluated for completeness through empty values. To assess internal validity, we evaluated patients with a BMI < 30 who had not undergone a revision/conversion bariatric surgery. An assessment of reported calculated BMI accuracy was also completed. We also assessed consistency through the percentage of patients with more than 5 and less than 20 units of BMI change in the initial 30 days. A chi-squared test was used to assess differences in the prevalence of complications and effects across years.


Table 1 summarizes the analysis for completeness, internal validity, and consistency. In the accuracy analysis, the average BMI difference calculated across 2015-2019 was -0.02 units. Up to 20.03% of data could potentially be unused for empty data.


MBSAQIP is a database with good data quality and minimal changes over the evaluated period.