From: Risk factors for venous thromboembolism of total hip arthroplasty and total knee arthroplasty: a systematic review of evidences in ten years
NOS
Percentages of studies N(n%)*
References of studies
8☆
14 (26%)
[11,14,27,32,38,39,41,43,45,48,50,54,56,63]
7☆
22 (41%)
[15,18,20-23,26,29,35-37,47,49,51,52,55,57-62,64]
6☆
18 (33%)
[12,13,16,17,19,24,25,28,30,31,33,34,40,42,44,46,53]