The length of stay in the post-anaesthesia care unit correlates with pain intensity, nausea and vomiting on arrival

Table 3 Multivariate analysis

	Length of stay	Postoperative pain	Postoperative nausea		Postoperative vomiting
Independent variables	ß	ß	OR	95% CI	OR	95% CI
Gender	0.008	0.055**	2.455**	1.783/3.382	3.194**	1.755/5.816
Age	0.036**	−0.148**	0.988*	0.979/0.998	0.992	0.974/1.009
ASA classification	0.159**	0.062**	1.101	0.859/1.410	0.915	0.593/1.414
Surgical specialities
General surgery	−0.047	0.074*	0.511	0.232/1.126	0.584	0.138/2.467
Cardiac surgery	0.058**	0.062**	0.411	0.128/1.325	0.781	0.091/6.678
Orthopaedic surgery	−0.021	0.099**	0.583	0.223/1.525	0.853	0.162/4.484
Spine surgery	0.058**	0.014	0.450	0.168/1.206	0.716	0.133/3.853
Urology	−0.073**	−0.015	0.015	0.979/0.998	0.530	0.093/3.036
Ophthalmology	−0.126**	−0.073**	0.299*	0.107/0.834	0.250	0.034/1.856
ENT surgery	−0.071**	−0.036**	0.689	0.170/2.792	n.a.	n.a.
Anaesthetic technique
MAC	−0.055**	0.028*	3.825*	1.172/12.485	0.813	0.090/7.330
RA	−0.001	−0.046**	2.675*	1.047/6.830	0.422	0.049/3.653
General anaesthesia	0.041**	0.104**	1.365	0.708/2.633	0.607	0.251/1.468
Combined anaesthesia	0.031*	0.010	1.101	0.514/2.359	0.647	0.226/1.851
Duration of anaesthesia	0.432**	0.144**	1.003**	1.001/1.005	1.003	1.000/1.006
Postoperative pain	0.051**	n.a.	1.161**	1.084/1.244	1.224*	1.099/1.363
Postoperative nausea/vomiting	0.025**	n.a.	n.a.	n.a.	n.a.	n.a.

To calculate predictors for length of PACU stay and postoperative pain, linear multiple regression analysis (displaying ß-weight = standardized coefficient) was used; to calculate predictors for postoperative nausea and vomiting, logistic regression analysis (displaying OR = odds ratio, 95% CI = 95% confidence interval) was used.
ASA classification American Society of Anesthesiologists’ classification, ENT ear-nose-throat, MAC monitored anaesthesia care, n.a. not applicable, RA regional anaesthesia (peripheral and central neuraxial).
*p <0.05, **p <0.001.

ISSN: 2047-0525