Bariatric surgery viable for teens with cognitive disabilities

Adolescents with severe obesity and cognitive impairment or developmental delay (CI/DD) lost as much weight, and at a similar rate, as their typically developing peers following laparoscopic sleeve gastrectomy (LSG), according in an observational study.

“On the basis of these new data, LSG appears to be a viable and successful short-term weight-management tool for adolescents with CI/DD, who are established as particularly vulnerable to obesity and secondary health concerns,” wrote Sarah E. Hornack, PhD, a psychologist with Children’s National Health System and George Washington University, both in Washington, and her associates.

“In fact, there may be advantages to undergoing surgery during adolescence rather than waiting until adulthood for this population,” they wrote in the journal Pediatrics. With more supports likely in place for teens undergoing this surgery, they won’t be “going it alone,” the authors noted, which “could translate to better cooperation with parental guidance regarding surgery requirements, including diet and exercise recommendations.”

Despite higher rates of obesity and related medical issues among youth with CI/DD, little research explores effective interventions in this population, the authors wrote.

They therefore compared outcomes among a group of 63 teens with obesity who underwent bariatric surgery during 2010-2017. The adolescents, who had a body mass index (BMI) of at least 40 kg/m² or one of at least 35 kg/m² with a medical comorbidity, first underwent preoperative psychological evaluations involving a cognitive assessment. The 17 adolescents with an IQ less than 80 were classified as having CI/DD, leaving 46 without CI/DD. Three teens had Down syndrome.

Age, sex, and BMI before surgery were similar in those with CI/DD versus those without. The majority of participants overall were female (65%) and black (57%) with an average age of 17 years and an average BMI of 51.2. Whites comprised 24% of participants while 17% were Hispanic and 1% another race/ethnicity.

The findings revealed that IQ did not predict weight loss. The percentage of excess BMI lost (%EBMIL) and rate of excess weight loss remained similar between those with and without CI/DD, though “a trend for a higher rate of change in %EBMIL for those individuals with CI/DD” suggested “they may experience greater rates of weight loss over time than their typically developing peers,” the authors reported. However, the proportion of participants assessed decreased with each follow-up, from 59 at 3 months to 14 at 24 months.

In addition to the small population, short-term follow-up and loss to follow-up, another study limitation is the lack of a control group of CI/DD patients who did not undergo bariatric surgery and instead received a behavioral intervention or other therapy.

But the authors noted existing evidence that “younger children respond better to behavioral interventions than adolescents do, suggesting that older youth may require a different treatment approach.” In addition, “bariatric surgery performed earlier in the trajectory of large weight gain has also been shown to lead to greater resolution of obesity, suggesting that waiting for adulthood can be detrimental,” they wrote.
 

SOURCE: Hornack SE et al. Pediatrics. 2019 Apr 15. doi: 10.1542/peds.2018-2908.