Table II.

Surgical characteristics in the pre-COVID (n = 124) versus post-COVID (n = 124) groups.

Variable	Pre-COVID	Post-COVID	p-value
THA, % (n)	22.5 (28)	30.6 (38)	0.178
Conversion THA, % (n)	10.7 (3)	10.5 (4)	0.922
Cemented, % (n)	7.1 (2)	0.0 (0)	0.176
TKA, % (n)	77.4 (96)	69.4 (86)	0.178
Cemented, % (n)	51.0 (49)	32.5 (28)	0.016
CCK, % (n)	6.3 (6)	7.0 (6)	1.000
Same-day bilateral procedures, % (n)	0.8 (1)	6.5 (8)	0.036
Type of anaesthesia, % (n)
Spinal	44.4 (55)	91.1 (113)	< 0.001
General endotracheal	55.6 (69)	8.9 (11)	< 0.001
First case of the day, % (n)	46.8 (58)	74.2 (92)	< 0.001
Mean EBL, ml (SD)	196.3 (223.8)	172.3 (151.0)	0.324
Total operating time, mins (SD)	164.3 (36.0)	174.3 (42.2)	0.045
Postoperative blood transfusion, % (n)	2.4 (3)	0.8 (1)	0.622

^*Chi-squared test.

^†Paired t-test.

CCK, constrained condylar knee; EBL, estimated blood loss; SD, standard deviation; THA, total hip arthroplasty; TKA, total knee arthroplasty.