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Table 1 Patient characteristics, PJI rate and treatment across 3 regions

From: Variation in Prosthetic Joint Infection and treatment strategies during 4.5 years of follow-up after primary joint arthroplasty using administrative data of 41397 patients across Australian, European and United States hospitals

  Australia Europe US Total
Hospitals
 Number of hospitals 4 11 7 22
Arthroplasties
 Number of arthroplasties 3705 26993 10699 41397
 % Hip 47% 50% 46% 49%
Patient characteristics at primary arthroplasty
 Average age 68.4 68.2 62.3 66.7
 Median age 70 69 63 68
 % Females 62% 61% 60% 61%
 % with 1 or more comorbidities 42% 56% 80% 61%
 Average number of comorbidities 0.8 0.9 1.7 1.1
 Median number of comorbidities 0 1 2 1
Length of stay (LOS) of primary arthroplasty admission
 Average LOS in arthroplasty spell 12.4 7.7 3.3 7.0
 Median LOS in arthroplasty spell 7 6 3 5
 % patients in upper quartile LOS 46% 33% 2% 26%
Prosthetic joint infections (PJI)
 PJI rate within 2 years 1.7% 1.4% 1.5% 1.4%
Treatment of prosthetic joint infection within 2.5 years
 Average number of procedures 0.9 1.3 1.6 1.4
 Median number of procedures 1 1 1 1