Abstract
Abstract Background The impact of underweight and obesity on clinical outcomes for intestinal Behçet’s disease (BD) is unknown. We aimed to identify the association between body mass index (BMI) and clinical outcomes in patients with intestinal BD. Methods We categorized 760 patients with intestinal BD according to the BMI at diagnosis into four groups (underweight, normal, overweight, obese) at Severance Hospital, Seoul, Korea between 1997 and 2021.We performed a Cox proportional hazard analysis to investigate the predictive capability of BMI for clinical outcomes such as biologics use, surgery, hospitalization and emergency room visit. Results Of the 760 patients, 130 patients were classified into underweight group (BMI<18.5), 384 patients into normal group (BMI 18.5~22.9), 152 patients into overweight group (BMI 23~24.9), and 94 patients into obese group (BMI≥25). Patients with a higher BMI group showed significantly lower cumulative rates of biologics use (p trend = 0.001), surgery (p trend = 0.008), hospitalization (p trend = 0.002), and emergency room visits (p trend = 0.003) than those with a lower BMI group. In a multivariate analysis, normal BMI group (HR: 0.667, 95% CI 0.483-0.992, p =0.014), overweight group (HR: 0.589, 95% CI 0.394-0.879,p=0.010), and obese group (HR: 0.515, 95% CI 0.321-0.828, p=0.006) were negatively associated with future hospitalization compared to underweight group. Overweight group (HR: 0.490, 95% CI 0.241-0.996, p =0.049) and obese group (HR: 0.312, 95% CI 0.116-0.840,p =0.021) were negatively associated with future biologics use compared to the underweight group. Normal BMI group (HR: 0.706, 95% CI 0.484- 1.029, p=0.070) and obese group (HR : 0.556, 95% CI 0.303-1.020,p=0.058) were negatively associated with future surgery compared to the underweight group. Normal BMI group (HR: 0.711, 95% CI 0.513-0.985, p=0.041) and obese group (HR: 0.602, 95% CI 0.376-0.963, p=0.034) were negatively associated with future emergency room visit compared to the underweight group. Conclusion Underweight could affect poor outcomes in intestinal Behçet’s disease. Physicians should pay attention to the patients with underweight and make an effort to improve nutritional status.
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