To the Editor We agree with Higa and Himpens¹ that obtaining long-term data following metabolic/bariatric surgery is a challenge and that appropriate analytical methods need to be used to account for missing data, although they are not a substitute for complete follow-up. However, we disagree with their characterization of 7-year data completeness in the Longitudinal Assessment of Bariatric Surgery (LABS) study.² Higa and Himpens stated, “data at 7 years were available for 1300 of the eligible 2277 patients (57%), not the 82.9% rate as reported.”¹ They determined their percentage by dividing the number of nonpregnant participants with 7-year weight data (n = 1300) by the number of participants at study entry (n = 2348) minus the number who died prior to year 7 (n = 71). However, as the article indicates, the study ended before 700 participants were due for the 7-year assessment.² Thus, it is inappropriate to include them in the denominator when calculating 7-year data completeness. Furthermore, because weights of pregnant women were excluded from the report, pregnant women (n = 9 at year 7) should not be counted in the denominator either.

致编辑我们同意Higa和Himpens ^1的观点，即在代谢/巴氏外科手术后获取长期数据是一个挑战，尽管不能代替完整的随访，但仍需要使用适当的分析方法来处理缺失的数据。 。但是，我们不同意他们在减肥手术纵向评估（LABS）研究中对7年数据完整性的描述。² Higa和Himpens说：“有7年的数据适用于2277例合格患者中的1300例（57％），而不是报道的82.9％。” ^1个他们通过将具有7年体重数据的未怀孕参与者的数量（n = 1300）除以研究开始时的参与者数量（n = 2348）减去第7年之前死亡的人数（n = 71）来确定百分比。但是，正如文章所指出的，该研究在700名参与者进行7年评估之前就已经结束了。²因此，在计算7年数据完整性时，将它们包含在分母中是不合适的。此外，由于报告中未包括孕妇的体重，因此孕妇（第7年的n = 9）也不应计入分母。