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 4 Multivariate Linear Regression Model (Dependent Variable: 24-hourly post-transition NRS-11 pain on movement, improvement [%])

	Unstandardised Beta Coefficients^a	P value	95% Confidence Interval for Beta
	Unstandardised Beta Coefficients^a	P value	Lower Bound	Upper Bound
(Constant)	0.28	0.32	−0.27	−0.82
Transition to SLBup ^b	0.06	0.47	−0.10	0.22
Age	0.001	0.89	−0.01	0.01
Incisional pain rating	−0.03	0.59	−0.12	0.07
P-OD transition from parenteral opioid	−0.04	.024	−.07	−.01
Mean 24-hourly pre-transition OMEDDs (?delete)	0.001	.52	−.001	.001
Mean 24-hourly post-transition OMEDDs	−0.001	.38	−.003	.001
Mean 24-hourly pre-transition NRS-11 POM	0.12	<.0001	.08	.16
Emergency surgery ^b	0.20	0.06	−0.01	0.41
Acuity of surgical presentation scale	−0.003	0.95	−0.10	0.09
Special analgesia technique used ^b	0.03	0.67	−0.12	0.18

^aunstandardized coefficients – Covariates (a, b, c etc) affect the dependent variable (y) by Y = constant + (a) x [coefficient_a] + (b) x [coefficient_b]
^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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