Article Figures & Data
Tables
Demographics n (%) Age (years) 64 (58-70) Female 393 (83.8) Males 76 (16.2) BMI (kg/m2) 34.6 (31-39.1) Smokers 12 (2.6) Comorbidities Diabetes mellitus 183 (39.0) Hypertension 264 (56.3) Cardiac disease 50 (10.7) Renal disease 13 (2.8) Rheumatoid arthritis 26 (5.5) Osteoporosis 13 (2.8) Indications for surgery Primary osteoarthritis 454 (96.8) Post-traumatic osteoarthritis 3 (0.6) Preoperative diagnosis of rheumatoid arthritis 26 (5.5) Arthritis secondary to still disease 1 (0.2) Continuous data are presented as median (Q1-Q3) and categorical data as number and percentages (%).
Operative data n (%) Duration of surgery (minutes) 155 (140-175) Duration of right tourniquet (minutes) 49 (42-57) Duration of left tourniquet (minutes) 45 (41-50) Postoperative data Hospital stay (days) 9 (8-11) Blood loss (ml) 140 (100-250) Revision of surgery 17 (3.6) Revision of surgery time (days) 265 (112-529) Complications Need blood transfusion 104 (22.1) ICU admission 6 (1.3) Intraoperative bleeding 2 (0.4) Intraoperative fracture 2 (0.4) Postoperative wound healing problem 3 (0.6) Postoperative infection 3 (0.6) Postoperative stiff joint 1 (0.2) Postoperative persistent pain 9 (1.9) Postoperative joint instability 1 (0.2) Postoperative hematoma 2 (0.4) Postoperative stroke 1 (0.2) Postoperative bilateral knee laxity 1 (0.2) Post operation right patellar Clunk syndrome 1 (0.2) Post operation left patellar Clunk syndrome 4 (0.9) Postoperative patellar dislocation 2 (0.4) Postoperative periprosthetic fracture 2 (0.4) Postoperative synovitis 2 (0.4) Postoperative pulmonary embolism 3 (0.6) Postoperative hemarthrosis 1 (0.2) Complications 132 (28.1) Continuous data are presented as median (Q1-Q3) and categorical data as number and percentages (%).
Factors Coefficient (95% CI) P-value Age 0.001 (-0.03 - 0.004) 0.69 Male 0.11 (0.02 - -0.19) 0.01 Body mass index 0.004 (-0.001 - 0.008) 0.10 Diabetes mellitus 0.06 (-0.004 - 0.13) 0.07 Hypertension -0.06 (-0.13 - 0.01) 0.08 Cardiac disease 0.12 (0.02 - 0.21) 0.02 Renal disease 0.23 (0.06 - 0.39) 0.01 Rheumatoid arthritis 0.02 (-0.12 - 0.16) 0.77 Osteoporosis 0.08 (-0.1 - 0.23) 0.39 CI: confidence interval
Factors OR (95% CI) P-value Age 1.01 (0.98 - 1.04) 0.49 Gender 0.89 (0.49 - 1.61) 0.69 Body mass index 1.02 (0.99 - 1.05) 0.32 Diabetes mellitus 1.29 (0.81 - 2.05) 0.28 Hypertension 1.35 (0.84 - 2.17) 0.22 Cardiac disease 2.25 (1.19 - 4.24) 0.01 Renal disease 0.74 (0.2 - 2.8) 0.66 Rheumatoid arthritis 1.14 (0.42 - 3.11) 0.79 Osteoporosis 2.48 (0.79 - 7.72) 0.12 OR: odd ratio CI: confidence interval