Table 2.

Patient demographics and spinal anesthesia utilization.

Characteristic	Procedure types
	THA	TKA	UKA
No.	66	35	180
Age of patient, y
19-49	14	2	13
50-64	34	20	76
≥65	18	13	91
Sex of patient
Male	23	17	82
Female	43	18	98
Spinal anesthesia
Bupivacaine 0.5%	4	0	3
Bupivacaine 0.75% in dextrose 8.25%	2	1	7
Mepivacaine injection 1.5%	0	22	146
Ropivacaine injection 0.2%	0	1	1
Ropivacaine injection 0.5%	59	10	19

THA, total hip arthroplasty; TKA, total knee arthroplasty; UKA, unicondylar knee arthroplasty.