Table 5.

Rate of intraoperative, local postoperative, and general complications and deaths according to class of Body Mass Index (BMI) of the patients treated by total knee arthroplasty.

	n. of trated patients	Patients with intraoperative complications (% of the total)	Patients with postoperative complications (% of the total)	Patients with general postoperative complications (% of the total)	Deaths in hospital
BMI <= 25	1840	9 (0.49) 5 bone fracture, 3 tendon rupture, 1 anest. complic	26 (1.4) 16 hematoma, 4 nerve injury 0 deep thrombosis 6 other	55 (3.0) 3 pulmonary embolism, 5 minor cardiac 14 acute anemia 5 urinary 28 other	2 (0.1)
25 < BMI <= 30	4692	13 (0.27) 4 bone fracture, 6 tendon/ligam rupture, 2 hemorrage 1 anest. complic	65 (1.4) 37 hematoma, 4 nerve injury 7 deep thrombosis 22 other	143 (3.0) 11 pulmonary embolism, 7 cardiac infarction 4 minor cardiac 32 acute anemia 17 urinary 72 other	5 (0.1)
30 < BMI <= 40	3031	7 (0.23) 3 bone fracture, 2 tendon/ligam rupture, 1 anest. complic	33 (1.1) 15 hematoma, 2 nerve injury 6 deep thrombosis 4 superficial infections 3 other	98 (3.2) 3 pulmonary embolism, 1 cardiac infarction 7 minor cardiac 17 acute anemia 15 urinary 55 other	1 (0.03)
BMI > 40	172	0 -	3 (1.7) 2 hematoma, 1 other	6 (3.5) 1 cardiac infarction 5 other	1 (0.58)
Total	9735	29 (0.30)	127 (1.3)	302 (3.1)	9 (0.1)

Rate of complications and deaths is not significantly different in the 4 classes of BMI. Fisher's exact Test > 0.05.