Background: Compressive symptoms are common in thyroid disease. Many studies have focused on the size of the gland and its effects on patients. However, few have taken into account the body mass of the patient. The aim of our study was to examine whether or not a patient's body mass index (BMI) influences symptomatic outcomes following thyroid surgery for benign disease.
Methods: We conducted a prospective analysis evaluating 60 patients that underwent thyroidectomy for benign goiter (single or multinodular) disease. Patients were classified as obese, overweight, or normal based on BMI. Pre- and post-operative surveys were administered including the MRC breathlessness scale, M.D. Anderson Dysphagia Inventory (MDADI), and the ThyPRO quality of life questionnaire to evaluate dysphagia, dyspnea, and quality of life respectively.
Results: Patients classified as obese (n=37) scored significantly worse pre-operatively on MRC, MDADI, and ThyPRO surveys when compared to overweight (n=13) or normal weight (n=10) counterparts. Subjects in the obese group, but not the other groups, showed post-surgical improvement on both the MRC and MDADI surveys (P<0.0001). Similarly, obese subjects showed significant improvement on all 11 domains of the ThyPRO survey following surgery (P<0.0001), and overall degree of improvement was highly correlated with BMI among all subjects (r=0.60; P=0.0005).
Conclusions: Obesity, as determined by BMI, is a critical factor to consider in the alleviation of compressive symptoms before and after thyroidectomy for goiter. Our analysis of survey data indicates obese subjects have increased benefit of surgery compared to their lighter counterparts.
Keywords: Thyroid; benign thyroid disease; dysphagia; dyspnea; goiter; malignancy; nodule; obesity; thyroidectomy.
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