Table 3

Analysis of patients that had PE versus no-PE 90 days post-primary TAR

PENo PEPE rate (%)Significance test, p value
Agen (proportion)n (proportion)
 <650 (0)463 (0.42)0.000.09
 65–743 (0.6)373 (0.34)0.80
 >752 (0.4)269 (0.24)0.74
Length of staymean (range)mean (range)
3.2 (1–9)3.8 (0–46)0.26
BMIn (proportion)n (proportion)
 Underweight0 (0)4 (0.01)0.000.9
 Normal0 (0)122 (0.2)0.00
 Overweight3 (1)487 (0.79)0.61
 Missing data2492
Genderpercentagepercentage
 Female20430.3
Indicationsn (proportion)n (proportion)
 Osteoarthritis5 (1.0)938 (0.849)0.500.9
 Rheumatoid arthritis0 (0)108 (0.098)0.00
 Inflammatory0 (0)23 (0.028)0.00
 Other0 (0)36 (0.033)0.00
Operationn (proportion)n (proportion)
 Uncemented5 (1.0)1087 (0.98)0.460.9
 Cement0 (0)15 (0.014)0.00
 Hybrid0 (0)3 (0.003)0.00
ASAn (proportion)n (proportion)
 1–24 (0.8)931 (0.84)0.430.58
 3–41 (0.2)174 (0.16)0.60
Charlsonn (proportion)n (proportion)
 0410850.40.003
 >01205.0
Prophylaxisn (proportion)n (proportion)
 Both5 (1)809 (0.73)1.00.73
 Chemical only0 (0)209 (0.18)0.0
 Mechanical only0 (0)54 (0.05)0.0
 None0 (0)33 (0.03)0.0
Deformityn (proportion)n (proportion)
 Neutral2 (0.5)451 (0.73)0.440.3
 Valgus1 (0.25)75 (0.12)1.30
 Varus1 (0.25)92 (0.15)1.10
 Missing data1487
Dorsiflexionn (proportion)n (proportion)
 5–202 (0.4)582 (0.53)0.340.5
 Neutral2 (0.4)421 (0.38)0.47
 Fix equinus1 (0.2)102 (0.1)0.97
Plantarflexionn (proportion)n (proportion)
 16–451 (0.25)376 (0.4)0.300.9
 5–153 (0.75)574 (0.6)0.50
 Missing data1155
Unit volume per yearn (proportion)n (proportion)
 >203 (0.6)643 (0.58)0.460.9
 <202 (0.4)462 (0.42)0.43
Organisation typen (proportion)n (proportion)
 NHS Hospital3 (0.6)979 (0.89)0.30.1
 Independent hospital1 (0.2)74 (0.07)1.3
 Independent treatment centre1 (0.2)52 (0.05)1.9
Previous operationn (proportion)n (proportion)
 None3 (0.75)397 (0.54)0.750.9
 Fusion0 (0)7 (0.01)0.0
 Ankle ORIF0 (0)59 (0.08)0.0
 Tibial osteotomy0 (0)4 (0.005)0.0
 Other0 (0)69 (0.09)0.0
 Previous fracture1 (0.25)204 (0.28)0.5
 Missing data1365
  • ASA, American Society of Anesthesiologists; BMI, body mass index; n, number of patients; NHS, National Health Service; ORIF, open reduction and internal fixation; PE, pulmonary embolism; TAR, total knee replacement.