The ratio of superior mesenteric artery diameter to superior mesenteric vein diameter based on non-enhanced computed tomography in the early diagnosis of spontaneous isolated superior mesenteric artery dissection

Yuan-li Lei, Wen-xing Song, Yi Lin, Hui-ping Li, He-ping Lyu, Jiao-zhen Chen, Zhang-ping Li, Jia-na Yin, Ji-ke Xue, Shou-quan Chen

Table 2. Comparison of SMA and its related indices

Variables Total patients (n=291) SISMAD group (n=97) Control group (n=194) t/χ2/Z P-value Diameter of SMA root, mm 9.43±1.41 10.25±1.56 9.02±1.13 6.897 <0.001 Diameter of SMA trunk, mm 8.70 (7.72-10.28) 11.18 (10.15-12.13) 8.00 (7.40-8.70) -13.217 <0.001 SMV diameter, mm 11.65±1.68 11.36±1.44 11.80±1.78 -2.128 0.034 SMA/SMV 0.75 (0.65-0.90) 1.00 (0.89-1.10) 0.69 (0.61-0.75) -12.671 <0.001 Maximum SMA diameter, mm 9.60 (8.70-10.89) 11.37 (10.39-12.38) 9.07 (8.33-9.69) -11.854 <0.001 Location of maximum SMA diameter (SMA trunk) 84 (28.9) 72 (74.2) 12 (6.2) 145.801 <0.001 Perivascular exudation 114 (39.2) 59 (60.8) 55 (48.2) 28.620 <0.001