Table 4.

Balancing metrics: including highest and lowest pain scores in the PACU and 50 hours postoperatively, average pain scores at 6, 12, 24 and 48 hours postoperatively, and antiemetic use in PACU and for 48 hours postoperatively.

VAS pain scores	Baseline		Implementation		P value
	N	Mean(±SD)	N	Mean(±SD)
Highest PACU	5135	5.6 (±3.3)	4667	5.4 (±3.3)	0.042
Lowest PACU	5135	2.6 (±2.6)	4667	2.5 (±2.5)	0.424
Last PACU	5135	3.3 (±2.5)	4667	3.3 (±2.5)	0.084
Highest, 50 hours postoperative	7819	6.9 (±2.8)	7387	6.8 (±2.8)	0.007
Lowest, 50 hours postoperative	7819	1.3 (±1.9)	7387	1.4 (±2)	0.008
Postoperative 6 hours	5183	4.3 (±2.9)	4736	4.2 (±2.9)	0.939
Postoperative 12 hours	4923	4.1 (±2.8)	4457	4.2 (±2.9)	0.136
Postoperative 24 hours	4174	4.5 (±2.8)	3878	4.4 (±2.8)	0.105
Postoperative 48 hours	3119	4.3 (±2.8)	2840	4.3 (±2.8)	0.759

Antiemetic use	Baseline	N (%)	Implementation	N (%)
PACU	8411	1360 (16.2%)	8090	1255 (15.5%)	0.240
48 hours postoperatively	8411	3482 (41.4%)	8090	3322 (41.1%)	0.647

PACU, postanaesthesia care unit; VAS, visual analogue scale.