Skip to main content
. 2015 Jun 26;10:97. doi: 10.1186/s13018-015-0241-5

Table 4.

Multivariable analysis of predictors of blood loss following total knee arthroplasty

Intra-operative blood loss (mL)
Predictor Regression coefficient (95 % CI) p value
Age 10.3 (4.8 to 15.9) <0.001
Surgeon B −131 (−235 to −27) 0.01
Drain Volume (mL)
Predictor Regression coefficient (95 % CI) p value
Medication (reference category is rivaroxaban alone) <0.001
 Low molecular weight heparin −282 (−360 to −205) <0.001
 Warfarin −238 (−406 to −70) 0.01
 Aspirin −300 (−464 to −137) <0.001
 Aspirin + rivaroxaban 133 (−2 to 267) 0.05
 Aspirin + LMWH −232 (−372 to −93) 0.001
Type of anaesthetic (reference category is general anaesthetic alone) 0.02
 Spinal −290 (−621 to 41) 0.09
 Regional 24 (−187 to 236) 0.82
 General + regional −193 (−341 to −45) 0.01
 Spinal + regional −201 (−350 to −51) 0.01
 General + spinal + regional −218 (−410 to −26) 0.03
Haemoglobin loss (g/L)
 Predictor Regression coefficient (95 % CI) p value
 Surgeon B −4.3 (−8.5 to −0.1) 0.04