Hindsight 20/20: What 2,385 Patients Say a Decade After Bariatric Surgery

Most of the published record on metabolic and bariatric surgery is written in kilograms, percentage points and hazard ratios. A survey published online this week in Obesity Surgery asks a question that is harder to tabulate and, for anyone weighing the operation, arguably more consequential: knowing what you know now, would you do it again?

The study — titled, with self-aware bluntness, Hindsight 20/20 — is a cross-sectional survey with retrospective electronic-health-record linkage at a single large academic medical center. Researchers at UT Southwestern screened their own records for adults who had undergone metabolic and bariatric surgery, and 2,385 of them answered. The respondents averaged 55 years of age, 84.7% were women, and the mean interval since their operation was 12.0 years, with a standard deviation of 7.5 — enough spread that a substantial share were more than fifteen years out.

Three in four would repeat the decision

Roughly 74.2% said they would choose surgery again. A further 7.3% were unsure. The remaining 18.5% said they would not.

Asked why they would do it again, the most commonly reported reason was overall health benefit — not the weight itself. That distinction matters in a field that is often discussed as if the scale were the only scoreboard, and it echoes the way long-horizon cohorts such as the LABS study, funded by NIDDK, have framed outcomes: comorbidity, function and quality of life alongside weight. The prospective design behind that framing — LABS-1 on safety, LABS-2 on longitudinal outcomes — is documented in this archive’s LABS study pages.

The exploratory adjusted model points in the same direction. Respondents with a higher preoperative BMI and a greater maximum percentage of total weight lost during follow-up had higher odds of saying yes. Longer time since surgery and a higher current BMI pushed the other way.

Then comes the finding that deserves to be read twice. The percentage of lost weight that had been regained was not independently associated with the willingness to choose surgery again. What tracked with dissatisfaction was where the patient’s weight sits now, and how many years have passed — not the size of the rebound measured from the best day.

The authors are explicit that this is not a causal story. The model is exploratory, the variables are mutually adjusted, and they caution against reading the associations as independent effects. They also disclose extensive consulting and research relationships with obesity-medicine manufacturers on the part of senior authors, and the sample comes from one center’s patient population, which is a selection filter no statistical method removes.

The drift the average hides

If weight recurrence is what the dissenters name first, it is worth knowing how ordinary recurrence is. A separate report in Obesity Surgery, from the multicentre Turkish Metabolic and Bariatric Surgery follow-up study, tracked 1,498 patients — 1,321 sleeve gastrectomies, 124 Roux-en-Y gastric bypasses and 53 one-anastomosis gastric bypasses — with median follow-up between roughly four and a half and five and a half years.

Nadir weight loss was nearly identical across the three procedures, about 38% of total body weight. At the last follow-up it was not: median total weight loss was 29.6% after sleeve, 31.7% after Roux-en-Y and 33.6% after one-anastomosis bypass. Recurrent weight gain was less frequent after one-anastomosis bypass than after sleeve in the propensity-matched comparison, 37.7% versus 61.6%, but that arm held only 53 patients and the authors call for larger prospective confirmation. The study also did not assess standardized remission or relapse endpoints, so it speaks to weight trajectories rather than to diabetes outcomes.

When the plateau arrives

The practical question that follows — what to do when weight loss stalls — is where the third paper of the week sits. A retrospective single-centre study in Surgical Endoscopy followed 88 patients after primary laparoscopic sleeve gastrectomy. Forty-five received standard follow-up; 43 began weekly semaglutide six months after surgery because of suboptimal weight loss or a plateau. The groups were statistically indistinguishable at the six-month mark, immediately before the drug started. By twelve months the semaglutide group had lower BMI and greater total and excess weight loss, and at 24 months those differences persisted alongside a more favourable lipid profile, with higher HDL cholesterol and lower total cholesterol and triglycerides.

It is a preliminary, non-randomized, single-centre comparison — the authors say so themselves — and it belongs in the same conversation as the fork between revisional surgery and incretin therapy that this archive examined earlier this month. What it does not do is explain the satisfaction survey. A patient who reaches a plateau is not automatically a patient who regrets the operation, and the Hindsight 20/20 data suggest the two feelings do not move together.

The follow-up tail behind the averages

Satisfaction is also a question about what the years after surgery demand. The NIDDK’s patient-facing page on weight-loss surgery side effects notes that follow-up interventions, further surgery and hospitalizations are relatively common within five years, affecting about one-third of patients, and that they are required more frequently after gastric bypass than after gastric sleeve. It also flags the slower costs: the body may not absorb enough nutrients, particularly without prescribed vitamins and minerals, and that shortfall can produce anemia and osteoporosis.

Two numbers, then, sit side by side in the same evidence base. Three in four patients, a decade out, would choose the operation again. About one in three need another procedure, an intervention or a hospital stay within five years. They are not contradictory, and they are not interchangeable — one comes from a single-centre survey of people who consented to answer a questionnaire, the other from a national patient-centered research network analysed in a different study. Holding both in view is closer to what the long-term literature actually says than either number alone.

This archive is independent of NIH and NIDDK and reports what studies, agencies and societies have published. It does not recommend for or against surgery for any individual.