Table 2.

Information of the 84 Postoperative Patients With DVT.

Items	Data in Detail
No. of DVT sites	68 patients with single site; 10 with double sites; 6 with 3 or more
Distribution of DVT	DVT in calf intermuscular veins with 65 patients; femoral vein 1 patient; popliteal vein 2 patients; anterior tibial veins 6 patients; posterior tibial veins 12 patients; fibular veins 23 patients
Fusion levels	41 cases with L4-5 level, 32 with L5-S1 level, 5 with L3-4 level, 4 with L2-3 level, and 2 with L1-2 level

Abbreviation: DVT, deep vein thrombosis.