Table 1.

Surgical Duration Quartiles for Total Hip and Knee Arthroplasty

Arthroplasty Procedure	Quartile	Time Range (min)
Total hip	First	0-68
	Second	69-86
	Third	87-110
	Fourth	≥111
Total knee	First	0-70
	Second	71-86
	Third	87-107
	Fourth	≥108