Complete opioid transition to sublingual Buprenorphine after abdominal surgery is associated with significant reductions in opioid requirements, but not reduction in hospital length of stay: a retrospective cohort study

Table 3 Multivariate Linear Regression Model (Dependent Variable: 24-hourly post-transition OMEDDS)

	Unstandardised Beta Coefficients^	P value	95% Confidence Interval for Beta
	Unstandardised Beta Coefficients^	P value	Lower Bound	Upper Bound
(Constant)	56.58	0.017	10.19	102.97
Transition to SLBup ^b	−25.73	< 0.0001	− 38.90	−12.56
Age	−0.15	0.47	−.57	.26
Incisional pain rating	−7.70	0.05	−15.47	.07
POD transition from parenteral opioid	−0.58	0.69	−3.36	2.20
Mean 24-hourly pre-transition OMEDDs	0.16	< 0.0001	.09	.23
Mean 24-hourly pre-transition NRS-11 POM	3.19	0.08	−.415	6.803
Emergency surgery ^b	.25	.978	−17.96	18.48
Acuity of surgical presentation scale	−2.79	.49	−10.80	5.22
Special analgesia technique used ^b	−.17	.98	−12.86	12.53

#unstandardized coefficients – Covariates (a, b, c etc) affect the dependent variable (y) by Y = constant + (a) x [coefficient] + (b) x [coefficient]
^bsignifies binary covariate – If binary factor is present, there is an increase of (β-coefficient x dependent variable unit) in the dependant variable unit value. For negative β-coefficients, the dependant variable similarly decreases

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