Table 2.

Cohort characteristics.

Demographics	Liposomal bupivacaine PAI	No PAI	Chi square	df	P value
Male	16	18	0.18	1	0.67
Female	34	32
			P value
Age	64 (46-88)	64 (38-85)	0.837
BMI	35 (21-58)	35 (20-63)	0.93
CCI	3.34 (2-6)	3.58 (0-8)	0.366
			Chi square	df	P value
Subvastus	33	39	1.79	1	0.18
Parapatellar	17	11

df, degrees of freedom; PAI, periarticular injection.