Pili Multigemini Is a Possible Risk Factor for Pilonidal Sinus Disease

The aim of this study is to analyze both previously proposed and new risk factors for the development of pilonidal sinus. This is a prospective case-control study consisting of 145 patients with pilonidal sinus disease (n = 45) and a control group (n = 100). All patients were admitted to the department of general surgery between January 2013 and May 2015. The patients' age, family history, medical history, sitting time in a day, sitting posture, body mass index (BMI), Garn hairiness score, and hair type were evaluated. There were significant differences between the groups in the following characteristics: age (P = 0.01); positive family history (P = 0.01); medical history (P = 0.01); sitting time in a day (P = 0.01); sitting posture (P = 0.01); BMI (P = 0.01); Garn score (P = 0.01); and hair type. Multivariate logistic regression analysis indicated that positive family history (P = 0.03); Garn score (P = 0.05); medical history (P = 0.01); and sitting posture (P = 0.02) were independent risk factors for the development of pilonidal sinus disease.