Anti-Phospholipid Antibodies in Patients Undergoing Total Joint Replacement Surgery

Table 1

Description of preoperative characteristics in a population undergoing joint replacement surgery by aPL status preoperatively.

Characteristic	Positive for APLA preoperatively	Negative for APLA preoperatively	P value
	54 (44)	69 (56)
Mean age at the time of surgery (±sd)	60.6 (16.8)	63.2 (9.3)	0.32
Mean body mass index—kg/m^2 (±sd)	34.2 (7.4)	35.0 (7.3)	0.56
𝑛 female (%)	30 (56)	42 (61)	0.55
𝑛 current or past smoker (%)	28 (52)	33 (48)	0.05
𝑛 missing	16 (30)	8 (12)
𝑛 receiving a total hip replacement (%)	16 (30)	18 (26)	0.06
𝑛 with a prior joint replacement surgery (%)	1 (2)	14 (20)	0.002
𝑛 with an indication to screen for thrombosis post-operatively (%)	8 (15)	7 (10)	0.43