title: Incidence of deep vein thrombosis after major lower limb orthopedic surgery: analysis of a nationwide claim registry.
abstract: OBJECTIVE
  We aimed to evaluate the nationwide incidence and risk factors for symptomatic deep vein thrombosis (DVT) after major lower limb orthopedic surgeries.
  
  
  METHODS
  The Korean Health Insurance Review and Assessment Service database was used to retrospectively identify International Classification of Disease-10 codes for DVT and operation codes representing hip arthroplasty, knee arthroplasty, and hip fracture surgeries. The age- and gender-adjusted annual incidence of DVT, rates of major lower limb orthopedic surgeries, and the postoperative incidence of DVT according to the surgical procedure were assessed.
  
  
  RESULTS
  The age- and gender-adjusted annual incidence of DVT was 70.67 per 100000 persons/year. Compared to patients aged <49 years, the relative risk of DVT was five times higher in patients aged 50-69 and 10 times higher in patients aged >70 years (p<0.001). Females showed a greater relative risk for DVT than males (1.08; p<0.001). The incidence of postoperative DVT, according to the type of surgery, was significantly greater for knee replacement arthroplasty than for other forms of surgery (p<0.002). The relative risk of postoperative DVT was higher in females in knee replacement arthroplasty (1.47) and hip fracture surgery (2.25) groups, although relatively lower in those who underwent hip replacement arthroplasty (0.97).
  
  
  CONCLUSIONS
  Among major lower limb surgeries, advanced age, female gender, and undergoing a knee replacement arthroplasty were found to be risk factors for developing postoperative DVT. These findings further emphasize the need for orthopedic surgeons to consider the development of DVT after surgery in high-risk patients.
authors.affiliation: Department of Orthopaedic Surgery, Ewha Womans University Mokdong Hospital, Seoul, Korea.
authors.forename: Seung Yeol
authors.initials: SY
authors.lastname: Lee
authors.affiliation: Department of Orthopaedic Surgery, Seoul National University Bundang Hospital, Seongnam, Korea.
authors.forename: Du Hyun
authors.initials: du H
authors.lastname: Ro
authors.affiliation: Department of Orthopaedic Surgery, Seoul National University Bundang Hospital, Seongnam, Korea.
authors.forename: Chin Youb
authors.initials: CY
authors.lastname: Chung
authors.affiliation: Department of Orthopaedic Surgery, Seoul National University Bundang Hospital, Seongnam, Korea.
authors.forename: Kyoung Min
authors.initials: KM
authors.lastname: Lee
authors.affiliation: Biomedical Research Institute, Seoul National University Bundang Hospital, Seongnam, Korea.
authors.forename: Soon Sun
authors.initials: SS
authors.lastname: Kwon
authors.affiliation: Department of Orthopaedic Surgery, Myongji Hospital, Goyang, Korea.
authors.forename: Ki Hyuk
authors.initials: KH
authors.lastname: Sung
authors.affiliation: Department of Orthopaedic Surgery, Seoul National University Bundang Hospital, Seongnam, Korea. pmsmed@gmail.com.
authors.forename: Moon Seok
authors.initials: MS
authors.lastname: Park
mesh_terms: D000293:Adolescent; D000328:Adult; D017677:Age Distribution; D000368:Aged; D002648:Child; D002675:Child, Preschool; D005260:Female; D006801:Humans; D015994:Incidence; D007223:Infant; D007231:Infant, Newborn; D007866:Leg / Q000601:surgery*; D008297:Male; D008875:Middle Aged; D019637:Orthopedic Procedures / Q000009:adverse effects*; D011183:Postoperative Complications / Q000453:epidemiology / Q000209:etiology; D012042:Registries / Q000706:statistics & numerical data*; D056910:Republic of Korea / Q000453:epidemiology; D012307:Risk Factors; D020246:Venous Thrombosis / Q000453:epidemiology* / Q000209:etiology*; D055815:Young Adult
keywords: Deep vein thrombosis; hip arthroplasty; hip fracture surgery; incidence; knee arthroplasty