Retraction Watch

Tracking retractions as a window into the scientific process

Archive for the ‘edward shang’ Category

Three more retractions for weight loss surgeon Edward Shang for making up data

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Edward Shang, the weight loss surgeon who lost his job at the University of Leipzig in May after it was revealed that he had made up most, if not all, of the patients in his research studies at the University of Mannheim, has retracted three more papers.

Here’s the notice, which is a bit, um, lean, given what we know about the case: Read the rest of this entry »

Weight loss surgeon who made up data loses job at University Hospital Leipzig

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Edward Shang

Edward Shang, a weight loss surgeon who has now retracted two papers for fraudulent data, is out of his job at the University Hospital Leipzig.

According to a university release — which was apparently retracted for about an hour and which we’ve had trouble accessing at various points this morning — Shang’s employment contract with the Leipzig hospital is “terminated by mutual agreement with immediate effect.”

The release also says Read the rest of this entry »

Puzzling: Maybe weight loss surgery paper by author who acknowledged fraud is being retracted after all

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We’ve been following the case of Edward Shang, a weight loss surgeon who has acknowledged making up most — if not all — of the patients in a now-retracted study in Surgery for Obesity and Related Diseases. Last week, we reported that Obesity Surgery, where Shang had published four papers, would not be retracting any of them. That’s what Surgery for Obesity and Related Diseases Obesity Surgery editor Scott Shikora told us in an email exchange (more on that below).

It turns out, however, that one of Shang’s Obesity Surgery papers had already been retracted, unbeknownst to us because the original abstract was not — and is still not — linked to the retraction notice, which reads: Read the rest of this entry »

Obesity Surgery won’t retract papers by weight loss surgeon who published fake data elsewhere

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Earlier this week, we reported on the case of Edward Shang, a weight loss surgeon who was forced to retract a study after it became clear that he had enrolled only about a third as many patients as he claimed — if he enrolled any at all. In that post, the editor in chief of Surgery for Obesity and Related Diseases, who retracted the paper, told us he had flagged the issue for Obesity Surgery editors, who had also published Shang’s work.

Yesterday, we heard back from the editor of Obesity Surgery, Scott Shikora, who tells us that he’s reviewed Shang’s four publications in his journal: Read the rest of this entry »

Written by Ivan Oransky

May 4th, 2012 at 11:00 am

Author retracts weight loss surgery paper after admitting most, if not all, of the subjects were made up

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If you had read “Aerobic endurance training improves weight loss, body composition, and co-morbidities in patients after laparoscopic Roux-en-Y gastric bypass,” a 2010 paper in Surgery for Obesity and Related Diseases, you might have been convinced by the title and findings that exercise was a good idea for people who’d had stomach stapling.

After all, the authors had operated on “60 consecutive morbidly obese patients” and then randomized them into “a low-exercise group (aerobic physical exercise 1 time for 1 hr/wk) or a multiple-exercise group (APE 2 times for 1 hr/wk)” so they could collect data on “age, gender, length of hospital stay, operative details, co-morbidities, postoperative complications, initial body weight and height, postoperative weight, and body composition.” When they did that, they found that “The multiple exercise group had a significantly more rapid reduction of body mass index, excess weight loss, and fat mass compared with the low-exercise group.”

Except that at best they had only operated on about a third the number of patients they said they had. Read the rest of this entry »