Table 4.

Multivariable Linear Regression Results for Overall and Subscale Scores of the Patient Mobilization Attitudes & Beliefs Survey for the ICU (PMABS-ICU), by Clinical Role and Years of Experience.^a

	Knowledge		Attitudes		Behaviors		Overall
Variables	β	P Value	β	P Value	β	P Value	β	P Value
Attending, fellow, NP/PA	[reference]
Nurse, clinical technician	−4.7	.031	3.7	.040	5.2	<.001	3.1	.026
Respiratory therapist	−2.9	.426	4.6	.119	3.5	.167	2.9	.206
Experience up to 10 years, per year	−0.8	.020	−0.9	.002	−0.7	.008	−0.8	<.001
Experience beyond 10 years, per year	0.4	.030	0.3	.107	0.2	.231	0.2	.057

Abbreviations: ICU, intensive care unit; NP, nurse practitioner; PA, physician assistant.

^aThe β represents the coefficient from the regression model, with numbers in bold denoting P < .05 using a multivariable linear regression model with a spline term for years of work experience with hospitalized patients (with a “knot” at 10 years, based on visual inspection of data, see Figure 1). To prevent overfitting the regression model, 6 clinical roles were collapsed to 3 categories: (1) attending physician, fellow physician, and NP/PA; (2) nurse and clinical technician; and (3) respiratory therapist, based on the anticipated similarity of perceived barriers due to related job roles.