a positive trendP > 0.05
One relevant study included 360 patients who underwent DSA and showed that ICAS severity increased with HbA1c level; specifically, HbA1c ≥ 6.5% was significantly positively correlated with anterior circulation stenosis ( r = 0.13, P < 0.05), and a positive trend was also observed for posterior circulation stenosis ( r = 0.13, P > 0.05).