Lack of Evidence that Obesity is a Cause of Pilonidal Sinus Disease

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Abstract
To find out whether pilonidal sinus is more common among obese people. Retrospective study from hospital records. Two university hospitals, Turkey. 419 patients who were operated on for pilonidal sinus disease; and 213 age and sex matched patients with benign diseases other than pilonidal sinus disease and who were not morbidly obese acted as controls. Comparison of body mass index (BMI) in the two groups. Patients with BMI of 25-30 were classified as overweight (61/419, 15% compared with 28/213, 13%), and those with BMI of 30 or more as obese (7/419 compared with 4/213, 2% in each group). Mean (SD) BMI of patients with pilonidal sinus disease was 26.0 (3.9) compared with 25.6 (3.9) in the control group (p = 0.4). Obesity alone is not an important factor in the aetiology of pilonidal sinus disease.

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