Fig. 2

Receiver-operating characteristic (ROC) analysis of the association between VAI and aICAS in comparison to BMI or WHR in the subgroups. a The subgroup of underweight and normal weight, P _{AUC (BMI vs VAI)} = 0.011; b The subgroup of overweight, P _{AUC (BMI vs VAI)} > 0.05; c The subgroup of obesity, P _{AUC (BMI vs VAI)} > 0.05; d The subgroup of no-abdominal obesity, P _{AUC (WHR vs VAI)} = 0.032; e The subgroup of abdominal obesity, P _{AUC (WHR vs VAI)} > 0.05; AUC, area under the ROC curve; aICAS, asymptomatic intracranial arterial stenosis; WHR, waist-to-hip ratio; BMI, body mass index; VAI, Visceral Adiposity Index