In particular, less is known about the effect of Adjustable Gastric Band (AGB) surgery on utility because it has only emerged as a predominant form of surgical treatment in the United States approximately within the last five years - for example, the first AGB surgery at UWMC was only performed in April 2007. In addition, assessment of cost-effectiveness of treatments requires understanding healthcare use after treatment (i.e. how many follow-up visits do you have with a doctor because of your surgical treatment) and AGB requires frequent follow-up visits in the first three years to make the surgical treatment effective. There is little information or research reporting the actual frequency of which patients are receiving follow-up care after AGB surgery, the cost for that care (is it a patient cost or insurance covered), or whether frequency of follow-up care affects long-term weight loss or health outcomes.