Key Factors in Weight Gain After Pediatric Tonsillectomy

Studies have indicated that adenotonsillectomy may be associated with significant weight gain after surgery, a problem that can be concerning for both parents and patients. Previous research also suggests that the postoperative weight gain associated with adenotonsillectomy occurs mostly in children who undergo the procedure as treatment for diagnosed obstructive sleep apnea (OSA). “Potentially worrisome weight gains following adenotonsillectomy occurred primarily in children under the age of 6 years who were underweight or normal weight to begin with.” At the 2012 annual meeting of the American Academy of Otolaryngology–Head and Neck Surgeons, my colleagues and I presented data from a study involving a large population of children undergoing adenotonsillectomy and the demographic factors that may contribute to weight gain. We analyzed medical records of children aged 6 months to 18 years who had their tonsils removed between 2008 and 2011. These data were then refined to only include medical records for children who were routinely examined for at least 6 months after their surgery and had recorded height and weight measurements. All patients in the study had a history of OSA or recurrent tonsillitis. Who’s At Risk for Weight Gain? Results of our analysis showed that, on average, patients had a weight gain of 0.5 to 2.0 lbs— equivalent to a 0.4- to 0.6-point increase in BMI scores—after their surgery. Importantly, the gains that were observed were not dependent on whether the children had OSA or recurrent tonsillitis. In a multiple linear regression analysis that controlled for gender and height, only age was significantly and negatively associated with changes in BMI. Potentially worrisome weight gains following adenotonsillectomy occurred primarily...